What is "thirty-twomo"

Trigesimo-secundo \Tri*ges"i*mo-se*cun"do\, n. A book composed of sheets so folded that each one makes thirty-two leaves; hence, indicating, more or less definitely, a size of book; -- usually written 32mo, or 32[deg], and called thirty-twomo.

n. 1 (context printing English) A paper size, (3.75"-5" x 2.5"-3.125"), one thirty-secondth of an uncut free sheet. 2 (context printing English) A book size, corresponding to the paper size.