n. pl. sex·to·dec·i·mos 1. The page size of a book composed of printer's sheets folded into 16 leaves or 32 pages. 2. A book composed of sextodecimo pages. In both senses also called sixteenmo. [Latin sextōdecimō, ablative of sextusdecimus, one sixteenth : sextus, sixth; see s(w)eks in the Appendix of Indo-European roots + decimus, tenth (from decem, ten; see dek in the Appendix of Indo-European roots).] |
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