Octavo

ok-tā′vō, adj. having eight leaves to the sheet.— n. a book printed on sheets folded into eight leaves, contracted 8vo—usually meaning a medium octavo, 6×9½ inches. Smaller octavos are—post 8vo, 5½×8½ in.; demy 8vo, 5¼×8 in.; crown 8vo, 5×7½ in.; cap 8vo, 4½×7 in. Larger octavos are—royal 8vo, 6½×10 in.; super-royal 8vo, 7×11 in.; imperial 8vo, 8¼×11 in.:— pl. Octā′vos .