Trigesimo-secundo
Tri`ges´i`mo-se`cun´do
a. 1. Having thirty-two leaves to a sheet; as, a trigesimo-secundo form, book, leaf, size, etc.
n. 1. 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°, and called thirty-twomo.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.