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WordReference Random House Learner's Dictionary of American English © 2024D, d /di/USA pronunciation n. [countable], pl. Ds or D's, ds or d's. - Linguisticsthe fourth letter of the English alphabet, a consonant.
- Education[sometimes: d] (in some grading systems) a grade or mark indicating poor or barely acceptable quality.
d',2 [Pron. Spelling.]- do (esp. before you):How d'you like them?
'd, - contraction of had: They'd already left.
- contraction of would: I'd like to see it.
- contraction of did: Where'd you go?
- contraction of -ed: She OK'd the plan.
D, Symbol.- [sometimes: d] the Roman numeral for 500.
D., an abbreviation of:- day.
- December.
- Democrat.
- Democratic.
- Doctor.
d., an abbreviation of:- date.
- daughter.
- day.
- deceased.
- diameter.
- died.
WordReference Random House Unabridged Dictionary of American English © 2024D, d (dē),USA pronunciation n., pl. D's or Ds, d's or ds. - the fourth letter of the English alphabet, a consonant.
- any spoken sound represented by the letter D or d, as in dog, ladder, ladle, or pulled.
- something having the shape of aD.
- a written or printed representation of the letter D or d.
- a device, as a printer's type, for reproducing the letter D or d.
d-, - Biochemistry[Symbol, Biochem.](of a molecule) having a configuration resembling the dextrorotatory isomer of glyceraldehyde: always printed as a small capital, roman character (distinguished from l-). Cf. d-.
d-, [Symbol, Chem., Biochem.]- Chemistry, Biochemistrydextrorotatory;
dextro- (distinguished from l-). Cf. D-.
d'1 ,prep. - Foreign Termsde (used in French names as an elided form of de):Charles Louis d'Albert.
- Foreign Termsdi (used in Italian names as an elided form of di):Gabriele d'Annunzio.
d'2 ,- Grammar[Pron. Spelling.]contraction of do or did before you:How d'you like your eggs cooked? D'you go to the movies last night?
'd, - contraction of had: I was glad they'd gone.
- contraction of did: Where'd they go?
- contraction of should or would: He'd like to go. I'd like to remind you of your promise.
- contraction of -ed: She OK'd the plan.
D, - [Elect.]debye.
- Educationdeep.
- depth.
- Music and Dance, Optics[Optics.]diopter.
- divorced.
- ChemistryDutch.
D, Symbol.- the fourth in order or in a series.
- (sometimes l.c.) (in some grading systems) a grade or mark, as in school or college, indicating the quality of a student's work as poor or barely passing.
- (sometimes l.c.) a classification, rating, or the like, indicating poor quality.
- [Music.]
- the second tone in the scale of C major, or the fourth tone in the relative minor scale, A minor.
- a string, key, or pipe tuned to this tone.
- a written or printed note representing this tone.
- (in the fixed system of solmization) the second tone of the scale of C major, called re.
- the tonality having D as the tonic note.
- (sometimes l.c.) the Roman numeral for 500. Cf. Roman numerals.
- [Chem.]deuterium.
- [Elect.]
- electric displacement.
- a battery size for 1.5 volt dry cells: diameter, 1.3 in. (3.3 cm);
length, 2.4 in. (6 cm).
- Biochemistryaspartic acid.
- Clothinga symbol for a shoe width size narrower than E and wider than C.
- Clothinga proportional brassiere cup size larger than C.
D., - day.
- December.
- Democrat.
- Democratic.
- Physicsdensity.
- ReligionDeus.
- BibleDeuteronomy.
- Doctor.
- dose.
- Dutch.
d., - (in prescriptions) give.
- date.
- daughter.
- day.
- deceased.
- deep.
- degree.
- delete.
- British Terms, Currencypence.
- British Terms, Currencypenny.
- Physicsdensity.
- depth.
- deputy.
- dialect.
- dialectal.
- diameter.
- died.
- dime.
- dividend.
- dollar;
dollars. - dose.
- drachma.
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