Definition of octavo noun from the Oxford Advanced Learner's Dictionary



BrE BrE//ɒkˈteɪvəʊ//
; NAmE NAmE//ɑːkˈteɪvoʊ//
; BrE BrE//ɒkˈtɑːvəʊ//
; NAmE NAmE//ɑːkˈtɑːvoʊ//
(pl. octavos) (specialist)
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a size of a book page that is made by folding each sheet of paper into eight leaves (= 16 pages) Word Originlate 16th cent.: from Latin in octavo ‘in an eighth’, from octavus ‘eighth’.
See the Oxford Advanced American Dictionary entry: octavo