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gill book

[gil]
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noun
  1. book gill.
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Origin of gill book

First recorded in 1880–85
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Examples from the Web for gill book

Historical Examples

  • The leaves (some 150 in number) of the gill-book (see figure) correspond to the tooth-like processes of the pectens of Scorpio.

    Encyclopaedia Britannica, 11th Edition, Volume 2, Slice 3

    Various