'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 (2 of 12)

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 (3 of 12)

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 (4 of 12)

D¹

or 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 (5 of 12)

D²

abbreviation

Electricity. debye.

deep.

depth.

Optics. diopter.

divorced.

Dutch (def. 7).

Definition for 'd (6 of 12)

D³

Symbol.

the fourth in order or in a series.

(sometimes lowercase) (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 lowercase) 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 lowercase) the Roman numeral for 500.Compare Roman numerals.

Chemistry. deuterium. Also D

Electricity.

electric displacement.
a battery size for 1.5 volt dry cells: diameter, 1.3 inches (3.3 centimeters); length, 2.4 inches (6 centimeters).

Biochemistry. aspartic acid.

a symbol for a shoe width size narrower than E and wider than C.

a proportional brassiere cup size larger than C.

Definition for 'd (7 of 12)

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 (8 of 12)

Symbol, Chemistry, Biochemistry.

dextrorotatory; dextro- (distinguished from l-).

Compare d-.

Definition for 'd (9 of 12)

d.¹

(in prescriptions) give.

Origin of d.

From the Latin word dā

Definition for 'd (10 of 12)

d.²

British. pence.

Origin of d.

From the Latin word denāriī

Definition for 'd (11 of 12)

d.³

date.

daughter.

day.

deceased.

deep.

degree.

delete.

Physics. density.

depth.

deputy.

dialect.

dialectal.

diameter.

died.

dime.

dividend.

dollar; dollars.

dose.

drachma.

Definition for 'd (12 of 12)

day.

December.

Democrat.

Democratic.

Physics. density.

Deus.

Deuteronomy.

Doctor.

dose.

Dutch.

Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020

British Dictionary definitions for 'd (1 of 7)

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

chess See algebraic notation

British Dictionary definitions for 'd (2 of 7)

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 (3 of 7)

contraction of

would or hadI'd; you'd

British Dictionary definitions for 'd (4 of 7)

symbol for

music

a note having a frequency of 293.66 hertz (D above middle C) or this value multiplied or divided by any power of 2; the second note of the scale of C major
a key, string, or pipe producing this note
the major or minor key having this note as its tonic

chem deuterium

maths the first derivative of a function, as in D(x ³ + x ²) = 3 x ² + 2 x

physics

dispersion
electric displacement

aeronautics drag

a semiskilled or unskilled manual worker, or a trainee or apprentice to a skilled worker
(as modifier)D worker See also occupation groupings

(Roman numeral) 500See Roman numerals

abbreviation for

Germany (international car registration)

Australian informal defenceI'm playing D in the match this afternoon
Australian informal defensive play

Word Origin for D

(for sense 8) from German Deutschland

British Dictionary definitions for 'd (5 of 7)

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 (6 of 7)

abbreviation for

(in animal pedigrees) dam

daughter

British currency penny or pennies

diameter

died

dinar(s)

dollar(s)

drachma(s)

Word Origin for d.

(sense 3 and 6) Latin denarius

British Dictionary definitions for 'd (7 of 7)

abbreviation for

US politics Democrat(ic)

government Department

dinar(s)

Don (a Spanish title)

Duchess

Duke

(in the US and Canada) Doctor

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

Medical definitions for 'd (1 of 5)

D 2²

abbr.

dexter

diffusing capacity

dead space

Medical definitions for 'd (2 of 5)

D 1¹

The symbol for the isotope deuterium.

Medical definitions for 'd (3 of 5)

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.

Medical definitions for 'd (4 of 5)

pref.

To the right; dextro:d-tartaric acid.

Medical definitions for 'd (5 of 5)

abbr.

diopter

dose

Scientific definitions for 'd

Abbreviation of diameter

单词	'd
释义	'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 (2 of 12) 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 (3 of 12) 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 (4 of 12) D¹ or 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 (5 of 12) D² abbreviation Electricity. debye. deep. depth. Optics. diopter. divorced. Dutch (def. 7). Definition for 'd (6 of 12) D³ Symbol. the fourth in order or in a series. (sometimes lowercase) (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 lowercase) 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 lowercase) the Roman numeral for 500.Compare Roman numerals. Chemistry. deuterium. Also D Electricity. electric displacement. a battery size for 1.5 volt dry cells: diameter, 1.3 inches (3.3 centimeters); length, 2.4 inches (6 centimeters). Biochemistry. aspartic acid. a symbol for a shoe width size narrower than E and wider than C. a proportional brassiere cup size larger than C. Definition for 'd (7 of 12) 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 (8 of 12) d- Symbol, Chemistry, Biochemistry. dextrorotatory; dextro- (distinguished from l-). Compare d-. Definition for 'd (9 of 12) d.¹ (in prescriptions) give. Origin of d. ¹ From the Latin word dā Definition for 'd (10 of 12) d.² British. pence. Origin of d. ² From the Latin word denāriī Definition for 'd (11 of 12) d.³ date. daughter. day. deceased. deep. degree. delete. Physics. density. depth. deputy. dialect. dialectal. diameter. died. dime. dividend. dollar; dollars. dose. drachma. Definition for 'd (12 of 12) D. day. December. Democrat. Democratic. Physics. density. Deus. Deuteronomy. Doctor. dose. Dutch. Dictionary.com UnabridgedBased on the Random House Unabridged Dictionary, © Random House, Inc. 2020 British Dictionary definitions for 'd (1 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 chess See algebraic notation British Dictionary definitions for 'd (2 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 (3 of 7) 'd contraction of would or hadI'd; you'd British Dictionary definitions for 'd (4 of 7) D symbol for music a note having a frequency of 293.66 hertz (D above middle C) or this value multiplied or divided by any power of 2; the second note of the scale of C major a key, string, or pipe producing this note the major or minor key having this note as its tonic chem deuterium maths the first derivative of a function, as in D(x ³ + x ²) = 3 x ² + 2 x physics dispersion electric displacement aeronautics drag a semiskilled or unskilled manual worker, or a trainee or apprentice to a skilled worker (as modifier)D worker See also occupation groupings (Roman numeral) 500See Roman numerals abbreviation for Germany (international car registration) Australian informal defenceI'm playing D in the match this afternoon Australian informal defensive play Word Origin for D (for sense 8) from German Deutschland British Dictionary definitions for 'd (5 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 (6 of 7) d. abbreviation for (in animal pedigrees) dam daughter British currency penny or pennies diameter died dinar(s) dollar(s) drachma(s) Word Origin for d. (sense 3 and 6) Latin denarius British Dictionary definitions for 'd (7 of 7) D. abbreviation for US politics Democrat(ic) government Department dinar(s) Don (a Spanish title) Duchess Duke (in the US and Canada) Doctor 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 Medical definitions for 'd (1 of 5) D 2² abbr. dexter diffusing capacity dead space Medical definitions for 'd (2 of 5) D 1¹ The symbol for the isotope deuterium. Medical definitions for 'd (3 of 5) 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. Medical definitions for 'd (4 of 5) d- pref. To the right; dextro:d-tartaric acid. Medical definitions for 'd (5 of 5) D. abbr. diopter dose The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company. Scientific definitions for 'd d Abbreviation of diameter The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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