a term used by anatomists for any cell, membrane, &c. that is remarkable for its fatness.

ADVIRBEITSAN, in geography, a province of Persia, in Asia, and part of the ancient Media. It is bounded on the N. by the province of Shirvan, on the S. by Irac-Agemi and Curdistan, on the E. by Gilan and the Calpian sea, and on the W. by Turcomania.