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forty-eightmo

[ fawr-tee-eyt-moh ]

noun

, plural for·ty-eight·mos
  1. a book size of about 2½ × 4 inches (6 × 10 centimeters), determined by printing on sheets folded to form 48 leaves or 96 pages. : 48mo, 48°
  2. a book of this size.


adjective

  1. in forty-eightmo.
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Word History and Origins

Origin of forty-eightmo1

First recorded in 1885–90; forty-eight + -mo

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forty-eighthforty-fifth