d-

\(|)dē\ prefix

Etymology: International Scientific Vocabulary, from dextr-

1. : dextrorotatory — usually printed in italic

d-tartaric acid

— compare dextr- 2

2. : having a similar configuration at a selected asymmetric carbon atom in an optically active molecule to the configuration of dextrorotatory glyceraldehyde — usually printed as a small capital

d-fructose

* * *

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

* * *

D¹ or d «dee», noun, plural D's or Ds, d's or ds.

1. the fourth letter of the English alphabet. There are two d's in Dad.

2. any sound represented by this letter.

3. (as a symbol) the fourth (of an actual or possible series): »

row D in the balcony.

4. the lowest passing grade in schools and colleges: »

to get a D in physics.

5. Music. a) the second tone in the scale of C major. b) a symbol representing this tone. c) a key, string, etc., that produces this tone. d) the scale or key that has D as its keynote: »

a concerto in D.

6. the Roman numeral for 500.

D² «dee», noun, plural D's.

anything shaped like the letter D.

-'d¹,

a spelling representing the informal pronunciation of: a) had. Examples: We'd come too early. What'd happened? b) did. Example: Where'd they disappear? c) would. Examples: They'd never go there. It'd be awful if they did.

-'d²,

suffix. a form of -ed² (Cf. ↑-ed), used with words ending in a vowel, as in henna'd hair, mascara'd eyes.

D- or d-,

combining form. dextro- (right handed) in configuration: »

d-glyceraldehyde = dextro-glyceraldehyde.

╂[< d(extro-)]

d (no period),

an abbreviation or symbol for the following:

1. deci-.

2. Physics. density.

3. diameter.

4. dyne.

5. British. penny (Latin, denarius) or pence (Latin, denarii), used before decimalization in 1971.

d.,

an abbreviation for the following:

1. dam (mother).

2. date.

3. daughter.

4. day or days.

5. dead.

6. degree.

7. deputy.

8. died.

9. dime.

10. dividend.

11. dollar.

12. dose.

D (no period),

an abbreviation or symbol for the following:

1. Department: »

DOT = Department of Transportation.

2. deuterium (chemical isotope).

3. Chemistry. didymium.

4. dinar.

5. Physics. displacement.

6. Dutch.

D.,

an abbreviation for the following:

1. deacon.

2. December.

3. a) Democrat. b) Democratic.

4. Department.

5. Doctor: »

M.D. = Doctor of Medicine. Ph.D. = Doctor of Philosophy.

6. dowager.

7. Duchess.

8. Duke.

9. duodecimo.

10. Dutch.

11. God (Latin, Deus).

12. Lord (Latin, Dominus).