1d

See also: 1D, 1-D, and 1/d

English

Etymology 1

From 1 d (“old penny”).

Noun

1d (plural 1ds)

1. (British, Ireland, historical) Abbreviation of one penny (a coin with the value of 1 pence/penny; 1/240th of a pound, in pre-decimalisation currency, never used for 'one new penny').

Etymology 2

Adjective

1d (comparative more 1d, superlative most 1d)

1. Initialism of one-dimensional.

Alternative forms

• 1-d, 1-D, 1D