a. (Med.) Good against burns or pyrosis. -- n. Anything of use in preventing or healing burns or pyrosis. [ 1913 Webster ]
a. [ Gr. &unr_;, fr. &unr_; to burn, fr. &unr_;, &unr_;, fire: cf. F. pyrotique. ] Caustic. See Caustic. -- n. (Med.) A caustic medicine. [ 1913 Webster ]