Bifluoride
an acid salt of hydrofluoric acid containing the group HF 2 -, as ammonium bifluoride, NH 4 HF 2.
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- Bifocal
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 […]
- Bifold
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
- Bifoliate
having two leaves. adjective having only two leaves adj.
- Bifoliolate
having two leaflets. adjective (of compound leaves) consisting of two leaflets
- Biform
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