† fraˈtrationObs.rare—1. [agent-n. f. L. frātrāre expressive of the swelling of the breasts of boys at puberty, f.frātr-, frāter brother.] 1666J. Smith Pourtract of Old Age 117 Inflation, and Turgescency of the Seminary vessels both preparatory, and ejaculatory; commonly called Fratration.