Part 73

Bind"ing post`. (Elec.) A metallic post attached to electrical apparatus for convenience in making connections.

Bind"ing screw`. A set screw used to bind parts together, esp. one for making a connection in an electrical circuit.

{ Bi`o*dy*nam"ic (?), Bi`o*dy*nam"ic*al (?) }, a.} (Biol.) Of or pertaining to biodynamics, or the doctrine of vital forces or energy.

Bi`o*dy*nam"ics (?), n. The branch of biology which treats of the active vital phenomena of organisms; -- opposed to biostatics.

Bi`o*ge*og"ra*phy (?), n. [Gr. bi`os life + E. geography.] The branch of biology which deals with the geographical distribution of animals and plants. It includes both zoögeography and phytogeography. - - Bi`o*ge`o*graph"ic (#), a. -- Bi`o*ge`o*graph"ic*al*ly (#), adv.

Bi"o*graph (?), n. [Gr. bi`os life + -graph.] 1. An animated picture machine for screen projection; a cinematograph.

2. [Cf. Biography.] A biographical sketch.

Bi`o*pho"to*phone (?), n. [Gr. bi`os life + photo + fwnh` sound, voice.] An instrument combining a cinematograph and a phonograph so that the moving figures on the screen are accompanied by the appropriate sounds.

Bi`o*plas"tic (?), a. (Biol.) Bioplasmic.

{ Bi`o*psy"chic (?), Bi`o*psy"chic*al (?) }, a.} [Gr. bi`os life + psychic, -cal.] Pertaining to psychical phenomena in their relation to the living organism or to the general phenomena of life.

Bi"o*scope (?), n. [Gr. bi`os life + -scope.] 1. A view of life; that which gives such a view.

Bagman's Bioscope: Various Views of Men and Manners. [Book Title.]

W. Bayley (1824).

2. An animated picture machine for screen projection; a cinematograph (which see).

Bi"plane (?), n. [Pref. bi- + plane.] (Aëronautics) An aëroplane with two main supporting surfaces one above the other.

Bi"plane, a. (Aëronautics) Having, or consisting of, two superposed planes, aërocurves, or the like; of or pertaining to a biplane; as, a biplane rudder.

Bi"prism (?), n. [Pref. bi- + prism.] 1. A prism whose refracting angle is very nearly 180 degrees.

2. A combination of two short rectangular glass prisms cemented together at their diagonal faces so as to form a cube; -- called also optical cube. It is used in one form of photometer.

Bird"man (?), n. An aviator; airman. [Colloq.]

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.

Black"bird, n. 1. Among slavers and pirates, a negro or Polynesian.

2. A native of any of the islands near Queensland; -- called also Kanaka. [Australia]