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dracunculus
Origin: L, dim. Of draco dragon.
<zoology> A fish; the dragonet.
The Guinea worm (Filaria medinensis).
Source: Websters Dictionary
(01 Mar 1998)
Dracunculus lova
Old incorrect term for Loa loa.
(05 Mar 2000)
Dracunculus medinensis
A species of skin-infecting, yard-long nematodes, formerly incorrectly classed as Filaria; adult worms live anywhere in the body of humans and various semi-aquatic mammals; the females migrate along fascial planes to subcutaneous tissues, where troublesome chronic ulcers are formed in the skin; when the host enters water, larvae are discharged from the ulcers, from which the head of the female worm protrudes; these larvae, if ingested by Cyclops species, develop in the intermediate host to the infective stage; humans and various animals contract the infection from accidental ingestion of infected Cyclops in drinking water. Popularly known as guinea, Medina, serpent, or dragon worm, and frequently thought to be the "fiery serpent" that plagued the Israelites.
Origin: L. Of Medina
(05 Mar 2000)
Dracunculus oculi
Old incorrect term for Loa loa.
(05 Mar 2000)
Dracunculus persarum
Old term for Dracunculus medinensis.
Origin: L. Of the Persians
(05 Mar 2000)
dradge
<chemical> Inferior ore, separated from the better by cobbing.
Source: Websters Dictionary
(01 Mar 1998)
draffish
Worthless; draffy.
Source: Websters Dictionary
(01 Mar 1998)
draft
1. A current of air in a confined space.
2. A quantity of liquid medicine ordered as a single dose.
Synonym: draught.
(05 Mar 2000)
draft environmental impact statement
(DEIS) A draft statement of environmental effects. Section 102 of the National Environmental Policy Act requires a DEIS for all major federal actions. The DEIS is released to the public and other agencies for comment and review.
(05 Dec 1998)
drag
1. To draw slowly or heavily onward; to pull along the ground by main force; to haul; to trail; applied to drawing heavy or resisting bodies or those inapt for drawing, with labour, along the ground or other surface; as, to drag stone or timber; to drag a net in fishing. "Dragged by the cords which through his feet were thrust." (Denham) "The grossness of his nature will have weight to drag thee down." (Tennyson) "A needless Alexandrine ends the song That, like a wounded snake, drags its slow length along." (Pope)
2. To break, as land, by drawing a drag or harrow over it; to harrow; to draw a drag along the bottom of, as a stream or other water; hence, to search, as by means of a drag. "Then while I dragged my brains for such a song." (Tennyson)
3. To draw along, as something burdensome; hence, to pass in pain or with difficulty. "Have dragged a lingering life." (Dryden) To drag an anchor, to trail it along the bottom when the anchor will not hold the ship.
Synonym: See Draw.
Origin: OE. Draggen; akin to Sw. Dragga to search with a grapnel, fr. Dragg grapnel, fr. Draga to draw, the same word as E. Draw. See Draw.
1. To be drawn along, as a rope or dress, on the ground; to trail; to be moved onward along the ground, or along the bottom of the sea, as an anchor that does not hold.
2. To move onward heavily, laboriously, or slowly; to advance with weary effort; to go on lingeringly. "The day drags through, though storms keep out the sun." (Byron) "Long, open panegyric drags at best." (Gay)
3. To serve as a clog or hindrance; to hold back. "A propeller is said to drag when the sails urge the vessel faster than the revolutions of the screw can propel her." (Russell)
4. To fish with a dragnet.
1. The act of dragging; anything which is dragged.
2. A net, or an apparatus, to be drawn along the bottom under water, as in fishing, searching for drowned persons, etc.
3. A kind of sledge for conveying heavy bodies; also, a kind of low car or handcart; as, a stone drag.
4. A heavy coach with seats on top; also, a heavy carriage.
5. A heavy harrow, for breaking up ground.
6. Anything towed in the water to retard a ship's progress, or to keep her head up to the wind; especially, a canvas bag with a hooped mouth, so used. See Drag sail (below). Also, a skid or shoe, for retarding the motion of a carriage wheel.
Hence, anything that retards; a clog; an obstacle to progress or enjoyment. "My lectures were only a pleasure to me, and no drag." (J. D. Forbes)
7. Motion affected with slowness and difficulty, as if clogged. "Had a drag in his walk."
8. The bottom part of a flask or mold, the upper part being the cope.
9. A steel instrument for completing the dressing of soft stone.
10. <engineering> The difference between the speed of a screw steamer under sail and that of the screw when the ship outruns the screw; or between the propulsive effects of the different floats of a paddle wheel. See Citation under Drag. Drag sail, a spiral hook at the end of a rod for cleaning drilled holes.
See: Drag, and cf. Dray a cart, and 1st Dredge.
Source: Websters Dictionary
(01 Mar 1998)
dragee
A sugar-coated pill or capsule.
Origin: Fr.
(05 Mar 2000)
dragees
<pharmacology> Sugar-coated medicines.
Origin: F. See Dredge.
Source: Websters Dictionary
(01 Mar 1998)
Dragendorff reagent
A reagent used in the detection of alkaloids.
(05 Mar 2000)
Dragendorff's test
A qualitative test for bile; a play of colours is produced by adding a drop of nitric acid to white filter paper or unglazed porcelain, moistened with a fluid containing bile pigments. The test is essentially the same as Gmelin's test for bile in urine.
(05 Mar 2000)
Dragendorff, Georg
<person> German physician and pharmaceutical chemist, 1836-1898.
See: Dragendorff's test.
(05 Mar 2000)
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