A suffix added to the names of certain numerals or to the numerals themselves, to indicate the number of leaves made by folding a sheet of paper; as, sixteenmo or 16mo; eighteenmo or 18mo. It is taken from the Latin forms similarly used; as, duodecimo, sextodecimo, etc. A small circle, placed after the number and near its top, is often used for -mo; as, 16¡, 18¡, etc.
Vogais: o
Consoantes: m
mo, -mi, mao, mho, moa, moe, mom, mon, moo, mow.