D

1. Elect. debye.

2. deep.

3. depth.

4. Optics. diopter.

5. divorced.

6. Dutch.

Symbol.

1. the fourth in order or in a series.

2. (sometimes l.c.) (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.

3. (sometimes l.c.) a classification, rating, or the like, indicating poor quality.

4. Music.

a. the second tone in the scale of C major, or the fourth tone in the relative minor scale, A minor.

b. a string, key, or pipe tuned to this tone.

c. a written or printed note representing this tone.

d. (in the fixed system of solmization) the second tone of the scale of C major, called re.

e. the tonality having D as the tonic note.

5. (sometimes l.c.) the Roman numeral for 500. Cf. Roman numerals.

6. Chem. deuterium.

7. Elect.

a. electric displacement.

b. a battery size for 1.5 volt dry cells: diameter, 1.3 in. (3.3 cm); length, 2.4 in. (6 cm).

8. Biochem. aspartic acid.

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

10. a proportional brassiere cup size larger than C.

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