Webster’s Revised Unabridged Dictionary · 1913
Dosage
Dos′age (dōs′āj), n. [Cf. F. dosage. See Dose, v.] 1. (Med.) The administration of medicine in doses; specif., a scheme or system of grading doses of medicine according to age, etc.
2. The process of adding some ingredient, as to wine, to give flavor, character, or strength.