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duodecimos |
1 definition found From Webster's Revised Unabridged Dictionary (1913) [web1913]: Duodecimo \Du*o*dec"i*mo\, n.; pl {Duodecimos}. A book consisting of sheets each of which is folded into twelve leaves; hence indicating, more or less definitely, a size of a book; -- usually written 12mo or 12[deg].