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Meaning of 16-gauge

16-gauge

Pronunciation: (siks'tēn-gāj'), [key]
— adj.
  1. of, pertaining to, or being a size of shotgun shell having a diameter of 0.662 in. (1.68 cm).
  2. of, pertaining to, or being a shotgun using such a shell.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.