D, d

[ dee ]
/ di /
|

noun, plural 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 a D.
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.

Definition for d (2 of 13)

D


Electricity. debye.
Optics. diopter.
divorced.

Definition for d (3 of 13)

D


Symbol.

Definition for d (4 of 13)

d-


Symbol, Chemistry, Biochemistry.

dextrorotatory; dextro- (distinguished from l-).
Compare d-.

Definition for d (5 of 13)

d.

1

(in prescriptions) give.

Origin of d.

1
From the Latin word

Definition for d (6 of 13)

d.

2

British. pence.

Origin of d.

2
From the Latin word denāriī

Definition for d (7 of 13)

Definition for d (8 of 13)

'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.

Definition for d (9 of 13)

Definition for d (10 of 13)

d-


Symbol, Biochemistry. (of a molecule) having a configuration resembling the dextrorotatory isomer of glyceraldehyde: always printed as a small capital, roman character (distinguished from l-).
Compare d-.

Definition for d (11 of 13)

d'

1

preposition

de (used in French names as an elided form of de): Charles Louis d'Albert.
di (used in Italian names as an elided form of di): Gabriele d'Annunzio.

Definition for d (12 of 13)

d'

2

Pronunciation Spelling. contraction of do or did before you: How d'you like your eggs cooked? D'you go to the movies last night?

Definition for d (13 of 13)

in d.


(in prescriptions) daily.

Origin of in d.

From the Latin word in diēs
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for d

British Dictionary definitions for d (1 of 7)

d

D

/ (diː) /

noun plural d's, D's or Ds

the fourth letter and third consonant of the modern English alphabet
a speech sound represented by this letter, usually a voiced alveolar stop, as in dagger
the semicircle on a billiards table having a radius of 11 1/2 inches and its straight edge in the middle of the baulk line

British Dictionary definitions for d (2 of 7)

d


symbol for

physics density or relative density
maths a small increment in a given variable or function: used to indicate a derivative of one variable with respect to another, as in d y /d x

British Dictionary definitions for d (3 of 7)

D


symbol for

abbreviation for

Germany (international car registration)
  1. Australian informal defenceI'm playing D in the match this afternoon
  2. Australian informal defensive play

Word Origin for D

(for sense 8) from German Deutschland

British Dictionary definitions for d (4 of 7)

D

D.


abbreviation for

Deutsch: indicating the serial number in the catalogue (1951) of the musical compositions of Schubert made by Otto Deutsch (1883–1967)

British Dictionary definitions for d (5 of 7)

d.


abbreviation for

Word Origin for d.

(sense 3 and 6) Latin denarius

British Dictionary definitions for d (6 of 7)

D.


abbreviation for

British Dictionary definitions for d (7 of 7)

'd


contraction of

would or hadI'd; you'd
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for d

D


fourth letter of the Roman alphabet, from Greek delta, from Phoenician and Hebrew daleth, pausal form of deleth "door," so called from its shape. The sign for "500" in Roman numerals. 3-D for "three-dimensional" is attested from 1953.

Online Etymology Dictionary, © 2010 Douglas Harper

Medicine definitions for d (1 of 4)

in d.


abbr.

in dies (daily)

Medicine definitions for d (2 of 4)

d-


pref.

Relating to the configuration of d-glyceraldehyde, a compound chosen as the basis for stereochemical nomenclature because it is the simplest carbohydrate that can form optical isomers:d-fructose.

Medicine definitions for d (3 of 4)

D.


abbr.

diopter
dose

Medicine definitions for d (4 of 4)

d-


pref.

To the right; dextro:d-tartaric acid.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.

Science definitions for d

d


Abbreviation of diameter
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.