Dictionary.net

-AL, g[=a]-len'ik, -al, adj. pertaining to Galen, the 2d-cent. Greek physician, or to his methods and theories.--ns. G[=A]'LENISM; G[=A]'LENIST.

That which relates to the doctrine of Galen or to Galenism. Used, substantively, for drugs that are not chymical.

Of, according to, Galen; esp. (remedy) made of vegetable, not chemical, components.

Relating to the doctrines or method of Galenus, physician at the court of Rome. He died circ. A.D. 200.