a. (Med.) Relating to apyrexy. “Apyrexial period.” Brande & C. [ 1913 Webster ]

{ ‖ } n. [ NL. apyrexia, fr. Gr. &unr_;; 'a priv. + &unr_; to be feverish, fr. &unr_; fire: cf. F. apyrexie. ] (Med.) The absence or intermission of fever. [ 1913 Webster ]