tome (n.)

1510s, "a single volume of a multi-volume work," from Middle French tome (16c.), from Latin tomus "section of a book, tome," from Greek tomos "volume, section of a book," originally "a section, piece cut off," from temnein "to cut," from PIE root *tem- "to cut." Sense of "a large book" is attested from 1570s.

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