'Prophylactical' definitions:
Definition of 'Prophylactical'
From: GCIDE
- Prophylactic \Proph`y*lac"tic\, Prophylactical \Proph`y*lac"tic*al\, a. [Gr. ?, fr. ? to guard against; ? before + ? to guard: cf. F. prophylactique.] (Med.) Defending or preserving from disease; preventive. --Coxe. [1913 Webster]