Bird"wom`an (?), n. An airwoman; an aviatress. [Colloq.]

{ Bis"ka*ra boil`, Bis"ka*ra but"ton }. [Named after the town Biskara, in Algeria.] (Med.) Same as Aleppo boil.

Bis"sell truck (?). A truck for railroad rolling stock, consisting of two ordinary axle boxes sliding in guides attached to a triangular frame; -- called also pony truck.

Bit, n. In the British West Indies, a fourpenny piece, or groat.

{ Bi"to (?), n., Bi"to tree` }. [Etym. uncertain.] (Bot.) A small scrubby tree (Balanites Ægyptiaca) growing in dry regions of tropical Africa and Asia.

The hard yellowish white wood is made into plows in Abyssinia; the bark is used in Farther India to stupefy fish; the ripe fruit is edible, when green it is an anthelmintic; the fermented juice is used as a beverage; the seeds yield a medicinal oil called zachun. The African name of the tree is hajilij.

Bi*tu"men proc"ess. (Photog.) Any process in which advantage is taken of the fact that prepared bitumen is rendered insoluble by exposure to light, as in photolithography.

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