Definition of octodecimo in English:


Syllabification: oc·to·dec·i·mo
Pronunciation: /ˌäktōˈdesəˌmō

noun (plural octodecimos)

  • 1A size of book page that results from the folding of each printed sheet into eighteen leaves (36 pages).
  • 1.1A book of octodecimo size.
    More example sentences
    • Rawles describes an octodecimo printed by Wechel and owned by a Scot.


mid 19th century: from Latin in octodecimo 'in an eighteenth', from octodecimus 'eighteenth'.

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Word of the day mage
Pronunciation: meɪdʒ
a magician or learned person