Bifacial
having two faces or fronts.
Archaeology. having the opposite surfaces alike, as some tools.
adjective
having two faces or surfaces
(botany) (of leaves, etc) having upper and lower surfaces differing from each other
(archaeol) (of flints) flaked by percussion from two sides along the chopping edge
bifacial
(bī-fā’shəl)
Flaked in such a way as to produce a cutting edge that is sharp on both sides. Used of a stone tool. ◇ Bifacial tools are known as a bifaces and include such early core tools as hand axes and cleavers as well as later flake tools such as blades and spear or arrow points. Compare unifacial.
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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. Historical Examples Encyclopaedia Britannica, 11th Edition, Volume 11, Slice 1 “Franciscans” to “French Language” Various Parallel Paths Thomas William Rolleston adjective (optics) having two different focuses relating […]
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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