| IR | drop of voltage across a resistor produced by a current; ileal resection; immune response; immunizat... |
|---|---|
| LVF | left ventricular failure; left ventricular function; left visual field; low-voltage fast; low-voltag... |
| EDS | edema disease of swine; egg drop syndrome; Ehlers-Danlos syndrome; Emery-Dreifus syndrome; energy-di... |
| FD | familial dysautonomia; family doctor; fan douche; fatal dose; fetal danger; fibrin derivative; fibro... |
| gt | drop [Lat. gutta] |
| ADO | Allele drop-out |
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| HMDE | Hanging Mercury Drop Electrode |
| I--V | Current-voltage |
| HVEM | High Voltage Electron Microscopy |
| HVA | High voltage activated |
| voltage | <physics> Electric potential or potential difference, expressed in volts. Source: Websters Dictionary (01 Mar 1998) |
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| voltage clamp | <physiology, technique> A technique in electrophysiology, in which a microelectrode is inserted into a cell and current injected through the electrode so as to hold the cells membrane potential at some predefined level. The technique can be used with separate electrodes for voltage sensing and current passing, for small cells, the same electrode can be used for both. Voltage clamp is a powerful technique for the study of ion channels. See: patch clamp. (18 Nov 1997) |
| voltage-gated channel | A class of ion channel's that open and close in response to change in the electrical potential across the plasma membrane of the cell; voltage-gated Na+ c.'s are important for conducting action potential along nerve cell processes. (05 Mar 2000) |
| voltage gated ion channel | <physiology> A transmembrane ion channel whose permeability to ions is extremely sensitive to the transmembrane potential difference. These channels are essential for neuronal signal transmission and for intracellular signal transduction. See: sodium channel. (18 Nov 1997) |
| voltage gradient | <physiology> Literally, the electric field in a region, defined as the potential difference between two points divided by the distance between them. Used more loosely, the potential difference across a plasma membrane. (18 Nov 1997) |
| voltage loop | <radiobiology> A wire which encircles the main axis of a tokamak in the vicinity of the vacuum vessel. The voltage induced in this loop during the shot is a measure of the ohmic heating voltage induced by transformer action and applied to the plasma. (09 Oct 1997) |
| 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) |
| 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) |
| intraspinal drop metastases | <radiology> Medulloblastoma, glioblastoma, pinealoma, ependymoma, ** intraspinal / extramedullary (12 Dec 1998) |
| voltage drop | a decrease in voltage along a conductor through which current is flowing |
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