1-D

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

English

Adjective

1-D (not comparable)

1. Initialism of one-dimensional.

Noun

1-D (uncountable)

1. A selective service class denoting that the registrant is already a reserve member of the armed forces or a student taking military training, as in ROTC or an accepted aviation cadet applicant.