d — ONAD · Shobdo

d/diː

▸ abbreviation

1 date.

2 (in genealogies) daughter.

3 day(s):

orbital period (Mars): 687.0d.

4 deceased.

5 deep.

6 [in combination] (in units of measurement) deci-.

7 (in travel timetables) departs.

8 (d.) died (used to indicate a date of death):

Barents, Willem (d.1597).

9 divorced.

10 British penny or pence (of predecimal currency):

£20 10s 6d.

[from Latin denarius ‘penny’.]

11 Chemistry denoting electrons and orbitals possessing two units of angular momentum:

d-electrons.

[d from diffuse, originally applied to lines in atomic spectra.]

▸ symbol

1 Mathematics diameter:

the circumference of a circle is expressed by the formula πd.

2 Mathematics denoting a small increment in a given variable:

dy/dx.