taurine
    adj 1: of or relating to or resembling a bull
    n 1: a colorless crystalline substance obtained from the bile of
         mammals

Taurine \Tau"rine\, a. [L. taurinus, fr. taurus a bull. See
   Taurus.] (Zool.)
   Of or pertaining to the genus Taurus, or cattle.
   [1913 Webster]

Taurine \Tau"rine\, n. [So named because it was discovered in
   the bile of the ox. See Taurus.] (Physiol. Chem.)
   A chemical compound occurring in small quantity in the juices
   of muscle, in the lungs, and elsewhere, but especially in the
   bile, where it is found as a component part of taurocholic
   acid, from which it can be prepared by decomposition of the
   acid. It crystallizes in colorless, regular six-sided prisms,
   and is especially characterized by containing both nitrogen
   and sulphur, being chemically amido-isethionic acid,
   C2H7NSO3.
   [1913 Webster]