noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   A paper size, (2.5"-3.1" x 2.5"-3.3"), one forty-eighth of a standard uncut flat sheet.
2. 2
   A book size, (2.5"-3.1" x 2.5"-3.3"), corresponding to the paper size.

Synonyms

All synonyms

48mo48ºforty-eightmofe

Etymology

From Latin ablatives of quadrāgēsimus (“fortieth”) and octāvus (“eighth”).

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.