| dronabinol | 6H-Dibenzo[b,d]pyran-l-ol, 6a,7,8,10a-tetrahydro-6,6,9-trimethyl-3-pentyl-, (6aR-trans)-;the principal psychoactive substance present in Cannabis sativa, used therapeutically as an antinauseant to control the nausea and vomiting associated with cancer chemotherapy. See: tetrahydrocannabinol. (05 Mar 2000) |
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| drone | 1. <zoology> The male of bees, especially. Of the honeybee. It gathers no honey. See Honeybee. "All with united force combine to drive The lazy drones from the laborious hive." (Dryden) 2. One who lives on the labors of others; a lazy, idle fellow; a sluggard. "By living as a drone,to be an unprofitable and unworthy member of so noble and learned a society." (Burton) 3. That which gives out a grave or monotonous tone or dull sound; as: A drum. Halliwell. The part of the bagpipe containing the two lowest tubes, which always sound the key note and the fifth. 4. A humming or deep murmuring sound. "The monotonous drone of the wheel." (Longfellow) 5. A monotonous bass, as in a pastoral composition. Origin: OE. Drane a dronebee, AS. Dran; akin to OS. Dran, OHG. Treno, G. Drohne, Dan. Drone, cf. Gr. A kind of wasp, dial. Gr. Drone. Prob. Named fr. The droning sound. See Drone. Source: Websters Dictionary (01 Mar 1998) |
| drone bee | <zoology> The male of the honeybee; a drone. Source: Websters Dictionary (01 Mar 1998) |
| drone fly | <zoology> A dipterous insect (Eristalis tenax), resembling the drone bee. See Eristalis. Source: Websters Dictionary (01 Mar 1998) |
| drongo | <zoology> A passerine bird of the family Dicruridae. They are usually black with a deeply forked tail. They are natives of Asia, Africa, and Australia. Synonym: drongo shrikes. Source: Websters Dictionary (01 Mar 1998) |
| dronte | <zoology> The dodo. Origin: F. Source: Websters Dictionary (01 Mar 1998) |
| droop | 1. To hang bending downward; to sink or hang down, as an animal, plant, etc, from physical inability or exhaustion, want of nourishment, or the like. "The purple flowers droop." "Above her drooped a lamp." "I saw him ten days before he died, and observed he began very much to droop and languish." (Swift) 2. To grow weak or faint with disappointment, grief, or like causes; to be dispirited or depressed; to languish; as, her spirits drooped. "I'll animate the soldier's drooping courage." (Addison) 3. To proceed downward, or toward a close; to decline. "Then day drooped." Origin: Icel. Drpa; akin to E. Drop. See Drop. Source: Websters Dictionary (01 Mar 1998) |
| drooping lily sign | <radiology> Appearance of renal pelvis with duplicated collecting system, upper pole moiety obstructs, becomes hydronephrotic, most likely to be compresses lower-pole moiety and pushes it downward see also: Weigert-Meyer rule (12 Dec 1998) |
| drop | 1. To fall in drops. "The kindly dew drops from the higher tree, And wets the little plants that lowly dwell." (Spenser) 2. To fall, in general, literally or figuratively; as, ripe fruit drops from a tree; wise words drop from the lips. "Mutilations of which the meaning has dropped out of memory." (H. Spencer) "When the sound of dropping nuts is heard." (Bryant) 3. To let drops fall; to discharge itself in drops. "The heavens . . . Dropped at the presence of God." (Ps. Lxviii. 8) 4. To fall dead, or to fall in death. "Nothing, says Seneca, so soon reconciles us to the thoughts of our own death, as the prospect of one friend after another dropping round us." (Digby) 5. To come to an end; to cease; to pass out of mind; as, the affair dropped. 6. To come unexpectedly; with in or into; as, my old friend dropped in a moment. "Takes care to drop in when he thinks you are just seated." (Spectator) 7. To fall or be depressed; to lower; as, the point of the spear dropped a little. 8. To fall short of a mark. "Often it drops or overshoots by the disproportion of distance." (Collier) 9. To be deep in extent; to descend perpendicularly; as, her main topsail drops seventeen yards. To drop astern, to sail, row, or move down a river, or toward the sea. To drop off, to fall asleep gently; also, to die. 1. To pour or let fall in drops; to pour in small globules; to distill. "The trees drop balsam." "The recording angel, as he wrote it down, dropped a tear upon the word and blotted it out forever." (Sterne) 2. To cause to fall in one portion, or by one motion, like a drop; to let fall; as, to drop a line in fishing; to drop a courtesy. 3. To let go; to dismiss; to set aside; to have done with; to discontinue; to forsake; to give up; to omit. "They suddenly drop't the pursuit." (S. Sharp) "That astonishing ease with which fine ladies drop you and pick you up again." (Thackeray) "The connection had been dropped many years." (Sir W. Scott) "Dropping the too rough H in Hell and Heaven." (Tennyson) 4. To bestow or communicate by a suggestion; to let fall in an indirect, cautious, or gentle manner; as, to drop hint, a word of counsel, etc. 5. To lower, as a curtain, or the muzzle of a gun, etc. 6. To send, as a letter; as, please drop me a line, a letter, word. 7. To give birth to; as, to drop a lamb. 8. To cover with drops; to variegate; to bedrop. "Show to the sun their waved coats dropped with gold." (Milton) To drop a vessel, to leave it astern in a race or a chase; to outsail it. Origin: OE. Droppen, AS. Dropan, v. I. See Drop. 1. The quantity of fluid which falls in one small spherical mass; a liquid globule; a minim; hence, also, the smallest easily measured portion of a fluid; a small quantity; as, a drop of water. "With minute drops from off the eaves." (Milton) "As dear to me as are the ruddy drops That visit my sad heart." (Shak) "That drop of peace divine." (Keble) 2. That which resembles, or that which hangs like, a liquid drop; as a hanging diamond ornament, an earring, a glass pendant on a chandelier, a sugarplum (sometimes medicated), or a kind of shot or slug. 3. Same as Gutta. Any small pendent ornament. 4. Whatever is arranged to drop, hang, or fall from an elevated position; also, a contrivance for lowering something; as: A door or platform opening downward; a trap door; that part of the gallows on which a culprit stands when he is to be hanged; hence, the gallows itself. A machine for lowering heavy weights, as packages, coal wagons, etc, to a ship's deck. A contrivance for temporarily lowering a gas jet. A curtain which drops or falls in front of the stage of a theater, etc. A drop press or drop hammer. <machinery> The distance of the axis of a shaft below the base of a hanger. 5. Any medicine the dose of which is measured by drops; as, lavender drops. 6. The depth of a square sail; generally applied to the courses only. 7. Act of dropping; sudden fall or descent. Ague drop, Black drop. See Ague, Black. Drop by drop, in small successive quantities; in repeated portions. "Made to taste drop by drop more than the bitterness of death." . Drop curtain. See Drop. 4. Drop forging. A drop hammer; sometimes, a dead-stroke hammer; also called drop. Drop scene, a drop curtain on which a scene is painted. See Drop. Drop seed. <botany> See Amaurosis. Origin: OE. Drope, AS. Dropa; akin to OS. Dropo, D. Drop, OHG. Tropo, G. Tropfen, Icel. Dropi, Sw. Droppe; and Fr. AS. Dreopan to drip, drop; akin to OS. Driopan, D. Druipen, OHG. Triofan, G. Triefen, Icel. Drjpa. Cf. Drip, Droop. Source: Websters Dictionary (01 Mar 1998) |
| drop finger | An avulsion, partial or complete, of the long finger extensor from the base of the distal phalanx. Synonym: drop finger, hammer finger, mallet finger. (05 Mar 2000) |
| drop hand | Paralysis of the extensors of the wrist and fingers; most often caused by lesion of the radial nerve. Synonym: carpoptosis, carpoptosia, drop hand. (05 Mar 2000) |
| drop heart | A condition in which the heart is unduly movable and displaced downward, as distinguished from bathycardia. See: cor mobile, cor pendulum. Synonym: drop heart. Origin: cardio-+ G. Ptosis, a falling (05 Mar 2000) |
| droperidol | <chemical> A butyrophenone with general properties similar to those of haloperidol. It is used in conjunction with an opioid analgesic such as fentanyl to maintain the patient in a state of neuroleptanalgesia in which he is calm and indifferent to his surroundings and able to cooperate with the surgeon. It is also used as a premedicant, as an antiemetic, and for the control of agitated patients in acute psychoses. Pharmacological action: anaesthesia adjuvants, antiemetics, antipsychotic agents, butyrophenone, dopamine antagonists. Chemical name: 2H-Benzimidazol-2-one, 1-(1-(4-(4-fluorophenyl)-4-oxobutyl)-1,2,3,6-tetrahydro-4-pyridinyl)-1,3-dihydro- (12 Dec 1998) |
| droplet | A diminutive drop, such as a particle of moisture discharged from the mouth during coughing, sneezing, or speaking; these may transmit infections to others by their airborne passage. Origin: drop + -let, dim. Suffix (05 Mar 2000) |
| droplet infection | Infection acquired through the inhalation of droplets or aerosols of saliva or sputum containing virus or other microorganisms expelled by another person during sneezing, coughing, laughing, or talking. (05 Mar 2000) |
Synonyms : Resistance, Antibiotic, Resistance, Drug
Synonyms : Antibacterial Drug Resistance
Synonyms : Antifungal Drug Resistance, Resistance, Antifungal Drug
Synonyms : Antimicrobial Drug Resistance, Antimicrobial Drug Resistances, Drug Resistances, Microbial
Synonyms : Multi-Drug Resistance, Multiple Drug Resistance, Resistance, Multiple Drug
| Dracunculus |
tuberous herbaceous perennials: dragon arum
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| Dracunculus medinensis |
Guinea worm: parasitic roundworm of India and Africa that lives in the abdomen or beneath the skin of humans and other vertebrates
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| draft |
a document ordering the payment of money; drawn by one person or bank on another a current of air (usually coming into a room or vehicle) a preliminary sketch of a design or picture a serving of drink (usually alcoholic) drawn from a keg; "they served beer on draft" preliminary version of a written work the depth of a vessel's keel below the surface (especially when loaded) a regulator for controlling the flow of air in a fireplace a dose of liquid medicine; "he took a sleeping draft" conscription: compulsory military service draw up an outline or sketch for something; "draft a speech" gulp: a large and hurried swallow; "he finished it at a single gulp" enlist: engage somebody to enter the army the act of moving a load by drawing or pulling blueprint: make a blueprint of
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| drive |
operate or control a vehicle; "drive a car or bus"; "Can you drive this four-wheel truck?" travel or be transported in a vehicle; "We drove to the university every morning"; "They motored to London for the theater" cause someone or something to move by driving; "She drove me to school every day"; "We drove the car to the garage" force: force into or from an action or state, either physically or metaphorically; "She rammed her mind into focus"; "He drives me mad" to compel or force or urge relentlessly or exert coercive pressure on, or motivate strongly; "She is driven by her passion" repel: cause to move back by force or influence; "repel the enemy"; "push back the urge to smoke"; "beat back the invaders" compel somebody to do something, often against his own will or judgment; "She finally drove him to change jobs" push, propel, or press with force; "Drive a nail into the wall" cause to move rapidly by striking or throwing with force; "drive the ball far out into the field" tug: strive and make an effort to reach a goal; "She tugged for years to make a decent living"; "We have to push a little to make the deadline!"; "She is driving away at her doctoral thesis" the act of applying force to propel something; "after reaching the desired velocity the drive is cut off" move into a desired direction of discourse; "What are you driving at?" a mechanism by which force or power is transmitted in a machine; "a variable speed drive permitted operation through a range of speeds" have certain properties when driven; "This car rides smoothly"; "My new truck drives well" campaign: a series of actions advancing a principle or tending toward a particular end; "he supported populist campaigns"; "they worked in the cause of world peace"; "the team was ready for a drive toward the pennant"; "the movement to end slavery"; "contributed to the war effort" work as a driver; "He drives a bread truck"; "She drives for the taxi company in Newark" move by being propelled by a force; "The car drove around the corner" driveway: a road leading up to a private house; "they parked in the driveway" urge forward; "drive the cows into the barn" the trait of being highly motivated; "his drive and energy exhausted his co-workers" hitting a golf ball off of a tee with a driver; "he sliced his drive out of bounds" proceed along in a vehicle; "We drive the turnpike to work" the act of driving a herd of animals overland strike with a driver, as in teeing off; "drive a golf ball" hit very hard and straight with the bat swinging more or less vertically; "drive a ball" a journey in a vehicle (usually an automobile); "he took the family for a drive in his new car" excavate horizontally; "drive a tunnel" a physiological state corresponding to a strong need or desire (computer science) a device that writes data onto or reads data from a storage medium cause to function by supplying the force or power for or by controlling; "The amplifier drives the tube"; "steam drives the engines"; "this device drives the disks for the computer" a wide scenic road planted with trees; "the riverside drive offers many exciting scenic views" hunting: search for game; "drive the forest" (sports) a hard straight return (as in tennis or squash) hunting: chase from cover into more open ground; "drive the game"
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| drilling |
the act of drilling boring: the act of drilling a hole in the earth in the hope of producing petroleum
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| DR | compel by coercion, threats, or crude means |
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| DR | emptying accomplished by draining |
| DR | a gradual depletion |
| DR | a pipe through which liquid is carried away |
| DR | tube inserted into a body cavity (as during surgery) to remove unwanted material |
| DR | make weak |
| DR | flow off or away gradually |
| DR | empty of liquid |
| DR | deplete of resources |
| DR | flow off gradually |
| DR | a filter in a sink drain |
| DR | drink to the last drop |