D defs.my
Entry 1 sense Webster, 1913

Protagon

· Pro·ta·gon · IPA
01 n. A nitrogenous phosphorized principle found in brain tissue. By decomposition it yields neurine, fatty acids, and other bodies.
  1. 1.
    A nitrogenous phosphorized principle found in brain tissue. By decomposition it yields neurine, fatty acids, and other bodies.(Physiol. Chem.)