Definitions

from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. The fourth letter of the modern English alphabet.
  • n. Any of the speech sounds represented by the letter d.
  • n. The fourth in a series.
  • n. Something shaped like the letter D.
  • n. The lowest passing grade given to a student in a school or college.
  • n. Music The second tone in the scale of C major or the fourth tone in the relative minor scale.
  • n. Music A key or scale in which D is the tonic.
  • n. Music A written or printed note representing this tone.
  • n. Music A string, key, or pipe tuned to the pitch of this tone.
  • abbr. deuteron
  • abbr. diameter
  • abbr. differential
  • abbr. down quark

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The fourth letter of the basic modern Latin alphabet.
  • n. cardinal number five hundred (500).
  • n. the differential of a quantity
  • n. voiced alveolar plosive
  • n. The fourth letter of the English alphabet, called dee and written in the Latin script.
  • n. The ordinal number fourth, derived from this letter of the English alphabet, called dee and written in the Latin script.
  • abbr. died, death.
  • abbr. declared; also abbreviated as dec
  • n. a British penny; an old penny (the modern decimal penny being abbreviated p).
  • n. dice to use in a diceroll
  • n. penny, a measure of the size of nails

from the GNU version of the Collaborative International Dictionary of English

  • The fourth letter of the English alphabet, and a vocal consonant. The English letter is from Latin, which is from Greek, which took it from Phœnician, the probable ultimate origin being Egyptian. It is related most nearly to t and th. See Guide to Pronunciation, √178, 179, 229.
  • The nominal of the second tone in the model major scale (that in C), or of the fourth tone in the relative minor scale of C (that in A minor), or of the key tone in the relative minor of F.
  • As a numeral D stands for 500. in this use it is not the initial of any word, or even strictly a letter, but one half of the sign � (or � ) the original Tuscan numeral for 1000.

from The Century Dictionary and Cyclopedia

  • The fourth letter and third consonant in the English alphabet: the corresponding character has the same position and the same value also in the Latin, Greek, and Phenician alphabets, from which it comes to us. (See A.)
  • As a numeral, in the Roman system, D stands for 500; when a dash or stroke is placed over it, as D, it stands for 5,000.
  • As a symbol: In music: The second tone, or re, of the scale of C.
  • A note which represents this tone.
  • The key-note of the key of two sharps .
  • On the keyboard of the organ or pianoforte, the white key or digital included in each group of two black keys.
  • The string in a stringed instrument that is tuned to the tone D, as the third string of the violin, etc. In chem., D is the symbol of didymium.
  • In mathematics, d is the sign of differentiation, ∂ of partial differentiation, δ of variation, D of derivation (commonly in the sense of taking the differential coefficient), ▵ of differencing, and ⾿ of the Hamiltonian operator.
  • In the mnemonic words of logic, the sign of reduction to darii.
  • As an abbreviation: In Eng. reckoning (d. or d.), an abbreviation of denarius, the original name for the English penny: as, £ s. d., pounds, shillings, and pence; 2s. 1d., two shillings and one penny.
  • Before a date (d.), an abbreviation of died.
  • In dental formulas, an abbreviation of deciduous, prefixed without a period to the letters i, c, and m: thus, di., deciduous incisor; dc., deciduous canine; dm., deciduous molar: all being teeth of the milk-dentition of a diphyodont mammal.
  • or, more simply, taking one half of each jaw only, di. , dc. , dm. . In either case the numbers above the line are those of the upper teeth, and those below the line of the under teeth. See dental.
  • In anatomy and ichthyology (d. or D.), an abbreviation of dorsal (vertebra or fin, respectively).
  • In a ship's logbook (d.), an abbreviation of drizzling.
  • A form of -ed, -ed, in certain words. See -ed, -ed.
  • An abbreviation of the Latin defensor fidei, defender of the faith. See defender.
  • An abbreviation of the Latin Dei gratia, by the grace of God.
  • An abbreviation of dead-reckoning.
  • In music: Also, the key-note of the minor key medieval music, the final of the Dorian and Hypodorian modes.
  • In chem.: d- before certain compounds has reference to their behavior toward polarized light, namely, to their dextrorotation, as distinguished from their inaction (i-) or levorotation (l-).
  • In mathematics: D is also used for the number denoting the deficiency of a curve (what its number of double points lacks of the maximum).
  • As an abbreviation: In law (D.), an abbreviation of Decree, Decret, Dictum.
  • In medicine (d.), an abbreviation of: diopter or dioptric;
  • dexter (right.);
  • divide (in prescriptions).
  • (D.) Of Democrat, Deus (God), Dominus (Lord), Dutch; (d.) of daughter, delete (cancel), density.
  • Short for damn (often printed d—).
  • Any mechanical device or appliance which resembles the letter D; specifically, in a harness, a loop of metal which has a straight bar joined at each end to a semicircular loop: used as a support for a strap. Also written dee. See D-trap and D-valve.
  • An abbreviation of Dean of the Faculty.
  • An abbreviation of deadhead or deadheaded.
  • An abbreviation of Doctor of Oratory
  • of Doctor of Osteopathy.
  • An abbreviation of Doctor of Pharmacy.
  • In electricity, an abbreviation for double pole.
  • n. In music, an abbreviation of da capo.
  • n. An abbreviation of Latin (ML.) divinitatis doctor, Doctor of Divinity.
  • n. In music, an abbreviation of destra mano (which see).
  • n. Abbreviations of Doctor of Music.
  • n. An abbreviation of dal segno.
  • n. An abbreviation of the Latin Deo volente, God willing. See Deo volente.
  • n. An abbreviation of Doomsday Book.
  • n. An abbreviation of direct current;
  • n. of District Court;
  • n. of District of Columbia;
  • n. of Deputy Consul;
  • n. of Divus Cæsar (the divine Cæsar).
  • n. An abbreviation of Dynamical Engineer, a degree conferred at the completion of a graduate course in mechanical engineering.
  • n. An abbreviation of Deputy Lieutenant;
  • n. of Doctor of Law, a degree equivalent to D. C. L.
  • n. of Doctor of Literature, a degree equivalent to D. Lit.
  • n. An abbreviation of Doctor of Science.
  • n. Abbreviations of Doctor of Theology.
  • n. An abbreviation of delirium tremens.
  • n. In electricity, of double-throw: as, a d. t. switch.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

  • n. the 4th letter of the Roman alphabet
  • adj. denoting a quantity consisting of 500 items or units
  • n. a fat-soluble vitamin that prevents rickets
  • n. the cardinal number that is the product of one hundred and five

Etymologies

Modification of capital letter D, from Ancient Greek letter Δ (D, "Delta"). (Wiktionary)
Lower case form of upper case roman numeral D, a standardization of D or Ð, from tally stick markings resembling a superimposed Ɔ and ⋌, from the practice of encircling each hundredth ⋌ notch. (Wiktionary)

Examples

  • "Och, to the d-- l with your manners honey," said he, clapping his two hands on my shoulders and pressing me down into the chair, "stay there since you're in it, and be d---- d to you."

    The Mirror of Taste, and Dramatic Censor, Vol. I, No. 5, May 1810

  • Yes, I'll be G-- d d---- d, "and his arms came down slapping against his hips," let him off, with what? why a reprimand at dress parade, that isn't worth a d-- n as a punishment.

    Red-Tape and Pigeon-Hole Generals As Seen From the Ranks During a Campaign in the Army of the Potomac

  • [Not to your distinct knowledge; but in all those who send people to 'the other place' for contempt of their interpretations, there is a lurking wish which is father to the thought; 'you _will_ be d---- d' and 'you _be_ d-- d' are Siamese twins].

    A Budget of Paradoxes, Volume II (of II)

  • I have heard the latter say, "d--- it, Sir, why do you not ride and head the hounds?" and he has frequently observed to me, and other sportsmen, "By G-d, that d---- d Parson stuffs himself so at master's table, that he is got as lazy as a cur."

    Memoirs of Henry Hunt, Esq. — Volume 2

  • Promoted to Headline (H3) on 10/11/09: Corporate Coup d 'Etat of the U.S. Economy yahooBuzzArticleHeadline =' Corporate Coup d\ 'Etat of the U.S. Economy'; yahooBuzzArticleSummary = 'Article: The concept of communism is reviled in this country for the simple reason that it is blind to human nature and allows a small group of individuals near-total control while sticking it to everyone else.

    Corporate Coup d' Etat of the U.S. Economy

  • Being a wise guy is one of the many ways in which the opposing side in a disputation is really saying: I know that I can't answer you, but I'm d----d if I'll admit it.

    Clarification

  • GRUBBS: I guess, if I were to seriously think about it, I-- you know, I ` d-- I ` d feel guilty.

    CNN Transcript Dec 17, 2009

  • If I ` d-- if I ` d been caught smoking, of -- he ` d have played U.S.

    CNN Transcript Oct 3, 2008

  • If there are two kinds d and d², for example, neither is partly identical to the other, and every longer duration is the sum of

    Determinates vs. Determinables

  • I assumed we ` d-- we ` d hit a train, hit something just because we were still in one piece.

    CNN Transcript Jul 7, 2005

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