4to

from WordNet (r) 3.0 (2006)

4to
    n 1: the size of a book whose pages are made by folding a sheet
         of paper twice to form four leaves [syn: {quarto}, {4to}]

from The Collaborative International Dictionary of English v.0.48

4to \4to\ n.
   1. the size of a book whose pages are made by folding a sheet
      of paper twice to form four leaves.

   Syn: quarto
        [WordNet 1.5]

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