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defervescence Definition

de·fer·ves·cence (dē′fər ves′əns, def′ər-)

noun

the abating or disappearance of a fever

Etymology: Ger defervescenz (first used by K. A. Wunderlich, 1815-77, Ger physician) < L defervescens, prp. of defervescere, to cool off, orig. stop boiling < de-, down, de- + fervescere, to grow hot: see effervesce