Definition of octodecimo in English:

octodecimo

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

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.

Origin

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

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