| dead tracts | Dentin areas characterised by degenerated odontoblastic processes; may result from injury caused by caries, attrition, erosion, or cavity preparation. (05 Mar 2000) |
|---|---|
| dead-end host | A host from which infectious agents are not transmitted to other susceptible host's. (05 Mar 2000) |
| dead-eye | A round, flattish, wooden block, encircled by a rope, or an iron band, and pierced with three holes to receive the lanyard; used to extend the shrouds and stays, and for other purposes. Synonym: deadman's eye. Source: Websters Dictionary (01 Mar 1998) |
| dead-stroke | <mechanics> Making a stroke without recoil; deadbeat. <machinery> Dead-stroke hammer, a power hammer having a spring interposed between the driving mechanism and the hammer head, or helve, to lessen the recoil of the hammer and reduce the shock upon the mechanism. Source: Websters Dictionary (01 Mar 1998) |
| deadbeat | <physics> Making a beat without recoil; giving indications by a single beat or excursion; said of galvanometers and other instruments in which the needle or index moves to the extent of its deflection and stops with little or no further oscillation. Deadbeat escapement. See Escapement. Source: Websters Dictionary (01 Mar 1998) |
| deadhearted | Having a dull, faint heart; spiritless; listless. Source: Websters Dictionary (01 Mar 1998) |
| deadly | 1. Capable of causing death; mortal; fatal; destructive; certain or likely to cause death; as, a deadly blow or wound. 2. Aiming or willing to destroy; implacable; desperately hostile; flagitious; as, deadly enemies. "Thy assailant is quick, skillful, and deadly." (Shak) 3. Subject to death; mortal. <botany> Deadly nightshade, a poisonous plant; belladonna. Source: Websters Dictionary (01 Mar 1998) |
| deadly agaric | <fungus> A poisonous species of mushroom known for destructive effects on the liver and kidneys. (27 Sep 1997) |
| deadly nightshade | <botany> An herbaceous European plant (Atropa belladonna) with reddish bell-shaped flowers and shining black berries. The whole plant and its fruit are very poisonous, and the root and leaves are used as powerful medicinal agents. Its properties are largely due to the alkaloid atropine which it contains. Called also deadly nightshade. A species of Amaryllis (A. Belladonna); the belladonna lily. Origin: It, literally fine lady; bella beautiful + donna lady. Source: Websters Dictionary (01 Mar 1998) |
| deadness | The state of being destitute of life, vigor, spirit, activity, etc.; dullness; inertness; languor; coldness; vapidness; indifference; as, the deadness of a limb, a body, or a tree; the deadness of an eye; deadness of the affections; the deadness of beer or cider; deadness to the world, and the like. Source: Websters Dictionary (01 Mar 1998) |
| deads | <chemical> The substances which inclose the ore on every side. Source: Websters Dictionary (01 Mar 1998) |
| deadwood | 1. A mass of timbers built into the bow and stern of a vessel to give solidity. 2. Dead trees or branches; useless material. Source: Websters Dictionary (01 Mar 1998) |
| deae-cellulose | <chemical> Diethylaminoethylcellulose. Cellulose derivative used in chromatography, as ion-exchange material, and for various industrial applications. Chemical name: Cellulose, 2-(diethylamino)ethyl ether (12 Dec 1998) |
| deae-dextran | <chemical> Diethylaminoethyldextran. Used as a support for ion-exchange chromatography. Chemical name: Dextran, 2-(diethylamino)ethyl ether (12 Dec 1998) |
| deaeration | Removal of gases from a liquid. (05 Dec 1998) |