sextodecimo

 
Pronunciation: /ˌsɛkstə(ʊ)ˈdɛsɪməʊ/
(abbreviation: 16mo)

noun (plural sextodecimos)

  • a size of book page that results from folding each printed sheet into sixteen leaves (thirty-two pages).
  • a book of sextodecimo size.

Origin:

late 17th century: from Latin sexto decimo, ablative of sextus decimus 'sixteenth'