(anc. geog.), a village of Atu- ria, lying between the rivers Lycus and Tigris; fa- mous for Alexander's victory over Darius. It is said to have been allowed to Darius Hystaspes for the maintenance of a camel; and hence the name. It was not far from a more considerable place called Arbela; whence the latter gave the name to the victory. See Arbela.

GAUGE-POINT of a solid measure, the diameter of a circle whose area is equal to the solid content of the same measure.