| drift velocity | <radiobiology> Characteristic velocity at which the centre of a particle's orbit (guiding centre) drifts when drift motion (see above) occurs. (09 Oct 1997) |
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| drift wave | <radiobiology> Oscillations in a magnetically-confined plasma arising in the presence of density gradients (such as at the plasma's surface). These resemble the waves that propagate at the interface of two fluids with different density in a gravitational field. (09 Oct 1997) |
| drifting | Random movement of a tooth to a position of greater stability. (05 Mar 2000) |
| driftpin | <mechanics> A smooth drift. See Drift. Source: Websters Dictionary (01 Mar 1998) |
| drifts | Slow ocular movements of greater amplitude than flicks, occurring during ocular fixation. Synonym: drift movements. (05 Mar 2000) |
| driftway | 1. A common way, road, or path, for driving cattle. 2. <chemical> Same as Drift. Source: Websters Dictionary (01 Mar 1998) |
| driftwood | 1. Wood drifted or floated by water. 2. Whatever is drifting or floating as on water. "The current of humanity, with its heavy proportion of very useless driftwood." (new Your Times) Source: Websters Dictionary (01 Mar 1998) |
| Drigalski, Wilhelm von | <person> German bacteriologist, 1871-1950. See: Drigalski-Conradi agar, Conradi-Drigalski agar. (05 Mar 2000) |
| Drigalski-Conradi agar | A selective, nutrient medium for isolation of Salmonella typhi and other intestinal pathogens from faecal specimens; it contains the dye crystal violet, which generally inhibits growth of Gram-positive, but not Gram-negative, bacteria. Synonym: Drigalski-Conradi agar. (05 Mar 2000) |
| drill | 1. To cause to flow in drills or rills or by trickling; to drain by trickling; as, waters drilled through a sandy stratum. 2. To sow, as seeds, by dribbling them along a furrow or in a row, like a trickling rill of water. 3. To entice; to allure from step; to decoy; with on. "See drilled him on to five-fifty." (Addison) 4. To cause to slip or waste away by degrees. " This accident hath drilled away the whole summer." (Swift) Origin: Cf. Trill to trickle, Trickle, Dribble, and W. Rhillio to put in a row, drill. 1. A small trickling stream; a rill. "Springs through the pleasant meadows pour their drills." (Sandys) 2. An implement for making holes for sowing seed, and sometimes so formed as to contain seeds and drop them into the hole made. A light furrow or channel made to put seed into sowing. A row of seed sown in a furrow. Drill is used adjectively, or as the first part of a compound; as, drill barrow or drill-barrow; drill husbandry; drill plow or drill-plow. Drill barrow, a wheeled implement for planting seed in drills. Drill bow, a small bow used for the purpose of rapidly turning a drill around which the bowstring takes a turn. Drill harrow, a harrow used for stirring the ground between rows, or drills. Drill plow, or Drill plough, a sort plow for sowing grain in drills. 1. An instrument with an edged or pointed end used for making holes in hard substances; strictly, a tool that cuts with its end, by revolving, as in drilling metals, or by a succession of blows, as in drilling stone; also, a drill press. 2. The act or exercise of training soldiers in the military art, as in the manual of arms, in the execution of evolutions, and the like; hence, diligent and strict instruction and exercise in the rudiments and methods of any business; a kind or method of military exercises; as, infantry drill; battalion drill; artillery drill. 3. Any exercise, physical or mental, enforced with regularity and by constant repetition; as, a severe drill in Latin grammar. 4. <zoology> A marine gastropod, of several species, which kills oysters and other bivalves by drilling holes through the shell. The most destructive kind is Urosalpinx cinerea. Bow drill, Breast drill. See Bow, Breast. Cotter drill, or Traverse drill, a machine tool for drilling slots. Diamond drill. See Diamond. Drill jig. See Jig. Drill pin, the pin in a lock which enters the hollow stem of the key. Drill sergeant, a noncommissioned officer whose office it is to instruct soldiers as to their duties, and to train them to military exercises and evolutions. Vertical drill, a drill press. <zoology> A large African baboon (Cynocephalus leucophaeus). Origin: Cf. Mandrill. Source: Websters Dictionary (01 Mar 1998) |
| drilling | The act of using a drill in sowing seeds. Source: Websters Dictionary (01 Mar 1998) |
| drillstock | <mechanics> A contrivance for holding and turning a drill. Source: Websters Dictionary (01 Mar 1998) |
| drimays | <botany> A genus of magnoliaceous trees. Drimys aromatica furnishes Winter's bark. Origin: NL, fr. Gr. Sharp, acrid. Source: Websters Dictionary (01 Mar 1998) |
| drink | 1. Liquid to be swallowed; any fluid to be taken into the stomach for quenching thirst or for other purposes, as water, coffee, or decoctions. "Give me some drink, Titinius." (Shak) 2. Specifically, intoxicating liquor; as, when drink is on, wit is out. Drink money, or Drink penny, an allowance, or perquisite, given to buy drink; a gratuity. Drink offering, an offering of wine, etc, in the Jewish religious service. In drink, drunk. "The poor monster's in drink." . Strong drink, intoxicating liquor; especially, liquor containing a large proportion of alcohol. " Wine is a mocker, strong drink is raging." (Prov. Xx. 1) 1. To swallow (a liquid); to receive, as a fluid, into the stomach; to imbibe; as, to drink milk or water. "There lies she with the blessed gods in bliss, There drinks the nectar with ambrosia mixed." (Spenser) "The bowl of punch which was brewed and drunk in Mrs. Betty's room." (Thackeray) 2. To take in (a liquid), in any manner; to suck up; to absorb; to imbibe. "And let the purple violets drink the stream." (Dryden) 3. To take in; to receive within one, through the senses; to inhale; to hear; to see. "To drink the cooler air, (Tennyson) "My ears have not yet drunk a hundred words Of that tongue's utterance." (Shak) "Let me . . . Drink delicious poison from thy eye." (Pope) 4. To smoke, as tobacco. "And some men now live ninety years and past, who never drank to tobacco first nor last." (Taylor (1630)) To drink down, to act on by drinking; to reduce or subdue; as, to drink down unkindness. To drink in, to take into one's self by drinking, or as by drinking; to receive and appropriate as in satisfaction of thirst. "Song was the form of literature which he [Burns] had drunk in from his cradle." . To drink off or up, to drink the whole at a draught; as, to drink off a cup of cordial. To drink the health of, or To drink to the health of, to drink while expressing good wishes for the health or welfare of. Source: Websters Dictionary (01 Mar 1998) |
| drinker | One who drinks; as, the effects of tea on the drinker; also, one who drinks spirituous liquors to excess; a drunkard. <zoology> Drinker moth, a large British moth (Odonestis potatoria). Source: Websters Dictionary (01 Mar 1998) |