1-D

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

English

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Adjective

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1-D (not comparable)

  1. Initialism of one-dimensional.

Noun

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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.