tŏmus — Lewis & Short
tŏmus, i, m., = to/mos.
I In gen., a cut, piece, bit: vilis, a cheap piece, i. e. roll of paper, Mart. 1, 67, 3. —
II In partic.
A A part, book, tome of a larger work: feci excerpta ex libris sexaginta in quinque tomis, M. Aurel. ap. Front, Ep. ad Caes. 2, 13. —
B Transf., a book, in gen.:
accipe tibi tomum magnum novum,Hier. Ep. 22, 38.