Webster's Revised Unabridged Dictionary · 1913

Bifocal

Bifocal , adjective

[Prefix bi-+ focal.]

Having two foci, as some spectacle lenses.

Bifocal , noun

[Prefix bi-+ focal.]

a bifocal lens.

Text from the public-domain GNU Collaborative International Dictionary of English, derived from Webster's Revised Unabridged Dictionary (1913). Definitions marked with were added by later GCIDE contributors and are not in the original 1913 edition.

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