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Entry 2 senses · 2 variants Webster, 1913

Octavo

· Oc·ta·vo · IPA
01 n. A book composed of sheets each of which is folded into eight leaves; hence, indicating more or less definitely a size of book so made; -- u…
pl. Octavos ((#))
  1. 1.
    A book composed of sheets each of which is folded into eight leaves; hence, indicating more or less definitely a size of book so made; -- usually written 8vo or 8°.
02 a. Having eight leaves to a sheet; as, an octavo form, book, leaf, size, etc.
  1. 1.
    Having eight leaves to a sheet; as, an octavo form, book, leaf, size, etc.