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

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.