The absence of fever; a normal body temperature, especially as a medical condition or sign of recovery.
From Greek 'a-' (without) + 'pyrexia' (fever). Pyrexia itself comes from 'pyr' (fire) + '-exia' (condition of), so apyrexia literally means 'no-fire condition.'
In pre-antibiotic medicine, apyrexia after days of high fever was literally a matter of life and death—the return to normal temperature often meant you'd survived the infection's worst assault!
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