Chiefly Optics. having two foci.
(of an eyeglass or contact lens) having two portions, one for near and one for far vision.
bifocals, bifocal eyeglasses or contact lenses.
Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 1 “Franciscans” to “French Language” Various
Parallel Paths Thomas William Rolleston
(optics) having two different focuses
relating to a compound lens permitting near and distant vision
capable of being folded into two parts, as with leaves that are hinged together: a bifold door; bifold shutters. Historical Examples Hints on cheese-making Thomas Day Curtis
having two leaves. adjective having only two leaves adj.
having two leaflets. adjective (of compound leaves) consisting of two leaflets
having or combining two forms, as a centaur or mermaid. Historical Examples The Genus Pinus George Russell Shaw adjective having or combining the characteristics of two forms, as a centaur