Pro"ta*gon (?), n. [Proto- + Gr. a contest. See. Protagonist. So called because it was the first definitely ascertained principle of the brain.] Physiol. Chem.

A nitrogenous phosphorized principle found in brain tissue. By decomposition it yields neurine, fatty acids, and other bodies.


© Webster 1913.

Log in or registerto write something here or to contact authors.