Add to Chrome


Octodecimo is a 10 letter word which starts with the letter O and ends with the letter O for which we found 2 definitions.

(a.) Having eighteen leaves to a sheet; as an octodecimo form book leaf size etc.
(n.) A book composed of sheets each of which is folded into eighteen leaves; hence; indicating more or less definitely a size of book whose sheets are so folded; -- usually written 18mo or 18ยก and called eighteenmo.
Words by number of letters: