| gt | drop [Lat. gutta] |
|---|---|
| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
| SB | Bachelor of Science; Schwartz-Bartter [syndrome]; serum bilirubin; shortness of breath; sick bay; si... |
| SCA | self-care agency; severe congenital anomaly; sickle-cell anemia; single-camera autostereoscopic [ima... |
| SPC | salicylamide, phenacetin, and caffeine; seropositive carrier; single palmar crease; single photoelec... |
| pure aphasias | Rare aphasias affecting only one type of communication, e.g., reading, while related communication forms such as writing, auditory comprehension, etc. Remain intact. (05 Mar 2000) |
|---|---|
| pure colour | A visual sensation produced by light of a specific wavelength. (05 Mar 2000) |
| pure culture | <cell culture, microbiology> A culture containing a single kind of microorganism. (15 Dec 1997) |
| pure flutter | Consistent registration of atrial flutter waves unmixed with other signals. (05 Mar 2000) |
| pure random drift | That which has random components only with an average value of zero and no systematic effects. Brownian movement in a still container shows pure random drift but in the Mississippi shows a steady downstream tendency. (05 Mar 2000) |
| pure red cell anaemia | Congenital nonregenerative, familial hypoplastic, or pure red cell anaemia; erythrogenesis imperfecta; Diamond-Blackfan syndrome; autosomal recessive normocytic normochromic anaemia resulting from congenital hypoplasia of the bone marrow, which is grossly deficient in erythroid precursors while other elements are normal; anaemia is progressive and severe, but leukocyte and platelet counts are normal or slightly reduced; survival of transfused erythrocytes is normal; minor congenital anomalies are found in some patients. Synonym: congenital nonregenerative anaemia, Diamond-Blackfan anaemia, Diamond-Blackfan syndrome, erythrogenesis imperfecta, familial hypoplastic anaemia, pure red cell anaemia. (05 Mar 2000) |
| pure red cell aplasia | A transitory arrest of red blood cell production which may occur in the course of a haemolytic anaemia, often preceded by infection, or as a complication of certain drugs; if the arrest persists anaemia may result. See: congenital hypoplastic anaemia. (05 Mar 2000) |
| pure tone audiogram | A chart of the threshold for hearing acuity at various frequencies usually expressed in decibels above normal threshold and usually covering frequencies from 128 to 8000 Hz. (05 Mar 2000) |
| pure-tone audiometer | An electroacoustical generator which produces pure tones of selected frequencies and calibrated output. (05 Mar 2000) |
| pure-tone audiometry | Audiometry utilizing tones of various frequencies and intensities as auditory stimuli to measure hearing, including comparisons of results from testing air conduction and bone conduction. (05 Mar 2000) |
| red drop effect | Experimental observation that the photosynthetic efficiency of monochromatic light is greatly reduced above 680 nm, even though chlorophyll absorbs well up to 700 nm. Led to the discovery of the two light reactions of photosynthesis. See: photosystems I and II. (18 Nov 1997) |
| wrist-drop | 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) |
| hanging drop | A drop of liquid on the undersurface of the object glass for examination under the microscope. (05 Mar 2000) |
| hanging drop slide | <microscopy> A glass slide with a concavity or a built-up chamber which allows a drop of culture to be placed on a cover- slip inverted over the cell. It makes possible the examination of freely moving protozoa, etc., confined only by the limits of the drop and the bottom surface of the coverslip. (05 Aug 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) |