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A hypothetical compound, C2H2N4 which may be regarded as benzene with four CH groups replaced by nitrogen atoms; also, any of various derivatives of the same. There are three isomeric varieties.

A hypothetical hydrocarbon, C4H4, analogous to benzene; -- so called from the four carbon atoms in the molecule. Tetrol phenol, furfuran. [Obs.]

A salt of a hypothetical thallic acid.

an acid extracted from cacao butter (from the Theobroma Cacao), peanut oil (from Arachis hypogæa), etc., as a white waxy crystalline substance.

of things, which terminates in speculation or contemplation, without a view to practice; hypothesis; speculation.

An affirmation, or distinction from a supposition or hypothesis.

The hypothetical radical C4H3S, regarded as the essential residue of thiophene and certain of its derivatives.

The hypothetical radical SO, regarded as an essential constituent of certain sulphurous compounds; as, thionyl chloride.

A salt of thiosulphuric acid; -- formerly called hyposulphite.

r designating, an unstable acid, H2S2O3, analogous to sulphuric acid, and formerly called hyposulphurous acid.

ing as being one of, or the last one of, a very great number; very small; minute; -- used hyperbolically; as, to do a thing for the thousandth time.

Fig.: Extravagant; exaggerated; high-flown. "Three-piled hyperboles." Shak.

Any one of the three hypothetical radicals corresponding to the three toluic acids.

The hypothesis, or doctrine, that living beings have originated by the modification of some other previously existing forms of living matter; -- opposed to abiogenesis. Huxley.

ection; athwart; -- often opposed to Ant: longitudinal. Transverse axis (of an ellipse or hyperbola) (Geom.), that axis which passes through the foci. -- Transverse partition (Bot.), a partition, as of a pericarp, at right angles with the valves, as in the siliques of mustard.

t-angled triangle, usually for every quarter of a degree of angle, and for lengths of the hypothenuse, from 1 to 100. (b) (Railroad) A platform with one or more tracks, and arranged to move laterally on wheels, for shifting cars, etc., from one line of track to another.

th Pole, containing three bright stars. Triangle spider (Zoöl.), a small American spider (Hyptiotes Americanus) of the family Ciniflonidæ, living among the dead branches of evergreen trees. It constructs a triangular web, or net, usually composed of four radii crossed by a double elastic fiber. The spider holds the thr…

A compound similar to sulphonal, used as a hypnotic in medicine.

ipping on a second fixed curve, the curves all being in one plane. Cycloids, epicycloids, hypocycloids, cardioids, etc., are all trochoids.

The hypodermic injection of tuberculin, which has little or no effect with healthy cattle, but causes a marked rise in temperature in tuberculous animals.