having two faces or fronts.
Archaeology. having the opposite surfaces alike, as some tools.
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
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.
furnished or fitted with two filaments or threads. Historical Examples Encyclopaedia Britannica, 11th Edition, Volume 9, Slice 2 Various adjective having two parallel threads, as in the suspension of certain measuring instruments of or relating to a resistor in which the wire is wound in a loop around a coil, the two leads being parallel, […]
having two flagella. Historical Examples Encyclopaedia Britannica, 11th Edition, Volume 10, Slice 4 Various adjective (biology) having two flagella: biflagellate protozoans
an acid salt of hydrofluoric acid containing the group HF 2 -, as ammonium bifluoride, NH 4 HF 2.
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 […]