The Collaborative International Dictionary of English v.0.48:
Antipyresis \An`ti*py*re"sis\, n. [NL., fr. Gr. 'anti` against + ? to be feverish, fr. ? fire.] (Med.) The condition or state of being free from fever. [1913 Webster]WordNet (r) 3.0 (2006):
antipyresis n 1: medication with antipyretics to treat a fever