/ok tay"voh, -tah"-/ , n. , pl. octavos for 2, adj.
n.
1. a book size of about 6 × 9 in. (16 × 23 cm), determined by printing on sheets folded to form 8 leaves or 16 pages. Symbol: 8vo, 8°
2. a book of this size.
adj.
3. in octavo.
[ 1575-85; short for NL in octavo in an eighth (of a sheet) ]