- Prophylactical
- 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]
The Collaborative International Dictionary of English. 2000.