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Webster's Dictionary (1865)

2 entries under this word

Duodecimo

Dū'o-dĕç'i-mo, a.

adjective

a. [Lat. in duodecimo, from duodecimus, twelfth, from duodecim, twelve.] Formed of sheets folded so as to make twelve leaves; of, or equal to, the size of one fold of a sheet of printing paper, when doubled so as to make twelve leaves; as, a duodecimo book; duodecimo size.

Dū'o-dĕc'i-mo, n.

noun

n.; pl. DŪ'O-DĔ'CI-MŌS.

  1. A book in which a sheet is folded into twelve leaves.
  2. The size of a book thus composed;—usually indicated thus: 12mo. or 12°.