4-letter words starting with d
- druv — (dialectal) Simple past tense and past participle of drive.
- drys — free from moisture or excess moisture; not moist; not wet: a dry towel; dry air.
- ds1c — (communications) A DS level and framing specification for digital signals in the North American digital transmission hierarchy. A DS1C signal uses 48 PCM channels and has a transmission rate of 3.15 Megabits per second, twice that of DS1. DS1C uses two DS1 signals combined and sent on a 3.152 megabit per second carrier which allows 64 kilobits per second for synchronisation and framing using "pulse stuffing". The channel 2 signal is logically inverted, and a framing bit is stuffed in two out of three code words, resulting in 26-bit information units. The channels are interleaved and then scrambled by the addition modulo 2 of the signal with the previous bit. Finally the bit stream is combined with a control bit sequence that permits the demultiplexor to function by preceding each 52 bits with one DS1C framing bit. A series of 24 such 53-bit frames forms a 1272-bit "M-frame".
- dsdm — Dynamic Systems Development Method
- dsee — Domain Software Engineering Environment
- dspl — Digital Signal Processing Language
- dsvd — Digital Simultaneous Voice and Data
- dt&e — Developmental Test and Evaluation
- dt's — the, delirium tremens.
- dtlr — Department of Transport, Local Government, and the Regions
- dtls — Descriptive Top-Level Specification
- dtmf — Dual Tone Multi Frequency
- dtor — (computing) abbreviation of destructor.
- dtss — (operating system) The first commercial time-sharing system, created by Dartmouth College and sold by General Electric around 1967. GE's Information Service Divsion (ISD) marketed DTSS which was running on a system called GE-265 (a combination of the front-end processor the Datanet-30 and the GE-235). DTSS was ported (and significantly improved by GE ISD around 1965-1966 on a combination of DN-30 and GE-635). This proprietary system, called Mk-II, later improved by GE and renamed Mk-III, is still working today (1997) as part of the GE service bureau that also includes IBM and Unix computers.
- dttp — either of two pyrimidine nucleotides used to synthesize DNA.
- duad — a group of two; couple; pair.
- dual — of, relating to, or noting two.
- duan — A division of a poem corresponding to a canto.
- duar — a mountain pass
- dubb — The Syrian brown bear (Ursus arctos syriacus).
- dubs — Plural form of dub.
- dubu — (Korea) tofu.
- duce — a leader or dictator.
- duci — a leader or dictator.
- duck — any of numerous wild or domesticated web-footed swimming birds of the family Anatidae, especially of the genus Anas and allied genera, characterized by abroad, flat bill, short legs, and depressed body.
- duct — any tube, canal, pipe, or conduit by which a fluid, air, or other substance is conducted or conveyed.
- dude — a man excessively concerned with his clothes, grooming, and manners.
- duds — a device, person, or enterprise that proves to be a failure.
- duel — a prearranged combat between two persons, fought with deadly weapons according to an accepted code of procedure, especially to settle a private quarrel.
- dues — owed at present; having reached the date for payment: This bill is due.
- duet — a musical composition for two voices or instruments.
- duff — organic matter in various stages of decomposition on the floor of the forest.
- dufy — Raoul [ra-ool] /raˈul/ (Show IPA), 1877–1953, French painter, lithographer, and decorator.
- dugs — the mamma or the nipple of a female mammal.
- duit — doit (def 1).
- duka — (Kenya) A shop, store.
- duke — Edward Kennedy ("Duke") 1899–1974, U.S. jazz pianist, composer, arranger, and conductor.
- dukw — a type of amphibious military transport used during World War II.
- dule — a state of suffering or misery
- dull — not sharp; blunt: a dull knife.
- duly — in a due manner; properly; fittingly.
- duma — (in Russia prior to 1917) a council or official assembly.
- dumb — lacking intelligence or good judgment; stupid; dull-witted.
- dump — to drop or let fall in a mass; fling down or drop heavily or suddenly: Dump the topsoil here.
- duna — German name of the Dvina.
- dune — a sand hill or sand ridge formed by the wind, usually in desert regions or near lakes and oceans.
- dung — excrement, especially of animals; manure.
- dunk — to dip (a doughnut, cake, etc.) into coffee, milk, or the like, before eating.
- duns — Plural form of dun.
- dunt — a hard blow or hit, especially one that makes a dull sound; thump.