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Webster 1913 Edition

Octavo

Oc-ta′vo

,
Noun.
;
pl.
Octavos
(#)
.
[L.
in octavo
;
in
in +
octavo
, abl. of
octavus
. See
Octave
.]
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°.

Oc-ta′vo

,
Adj.
Having eight leaves to a sheet;
as, an
octavo
form, book, leaf, size, etc.

Webster 1828 Edition

Octavo

OCTA'VO

,
Noun.
[L. octavus, eighth.] A book in which a sheet is folded into eight leaves. The word is used as a noun or an adjective. We say, an octavo, or an octavo volume. The true phrase is, a book in octavo.

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