| 单词 | d |
| 释义 | Word Frequency d or D (diː) nounWord forms: plural d's, D's or Ds 1. the fourth letter and third consonant of the modern English alphabet 2. a speech sound represented by this letter, usually a voiced alveolar stop, as in dagger 3. the semicircle on a billiards table having a radius of 111⁄2 inches and its straight edge in the middle of the baulk line Word Frequency dsymbol for 1. physics density or relative density 2. mathematics 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 3. chess algebraic notation Word Frequency Dsymbol for 1. music a. 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 b. a key, string, or pipe producing this note c. the major or minor key having this note as its tonic 2. chemistry deuterium 3. mathematics the first derivative of a function, as in D(x3 + x2) = 3 x2 + 2 x 4. physics a. dispersion b. electric displacement 5. aeronautics drag 6. a. a semiskilled or unskilled manual worker, or a trainee or apprentice to a skilled worker b. (as modifier) D worker See also occupation groupings 7. (Roman numeral) 500 Roman numerals abbreviation for 8. Germany (international car registration) 9. Australian informal a. defence I'm playing D in the match this afternoon b. Australian informal defensive play Word origin (for sense 8) from German DeutschlandWord Frequency D or D. abbreviation for Deutsch: indicating the serial number in the catalogue (1951) of the musical compositions of Schubert made by Otto Deutsch (1883–1967) Word Frequency d.abbreviation for 1. (in animal pedigrees) dam 2. daughter 3. British currency penny or pennies 4. diameter 5. died 6. dinar (s) 7. dollar (s) 8. drachma (s) Word origin (sense 3 and 6) Latin denariusWord Frequency D.abbreviation for 1. US politics Democrat (ic) 2. government Department 3. dinar(s) 4. Don (a Spanish title) 5. Duchess 6. Duke 7. (in the US and Canada) Doctor Word Frequency 'dcontraction of would or had I'd you'd |
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