controversion (iou) and protagon (medicine)

controversion (iou)

controversion noun. L17.
[Old French from late Latin controversio(n-), from Latin controversus: see CONTROVERSY, -ION.]
A turning in the opposite direction (lit. & fig.). L17.
A controversy, a dispute. L17-M18.
The action of controverting. M18.

protagon (medicine)

protagon
<physiology> A nitrogenous phosphorized principle found in brain tissue. By decomposition it yields neurine, fatty acids, and Other bodies.

Origin: Proto- + Gr. A contest. See. Protagonist. So called because it was the first definitely ascertained principle of the brain.

Source: Websters Dictionary

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