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The abatement of a fever.

[From Latin dēfervēscēns, dēfervēscent-, present participle of dēfervēscere, to stop boiling, cool off : dē-, de- + fervēscere, to grow hot, inchoative of fervēre, to be hot, boil; see bhreu- in Indo-European roots.]

de′fer·vesce′ (-vĕs′) v.
de′fer·ves′cent adj.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


1. (Medicine) the abatement of a fever
2. (Medicine) the period during which this occurs
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ˌdi fərˈvɛs əns, ˌdɛf ər-)
abatement of fever.
[1865–70; < German Deferveszenz < Latin dēfervēsc(ent-)=dē- de- + fervēscere to begin to boil. See effervescent]
de`fer•ves′cent, adj.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.defervescence - abatement of a fever as indicated by a reduction in body temperature
abatement, hiatus, reprieve, respite, suspension - an interruption in the intensity or amount of something
Based on WordNet 3.0, Farlex clipart collection. © 2003-2012 Princeton University, Farlex Inc.
References in periodicals archive ?
By hospital day 3, she defervesced and remained afebrile with stable vital signs and no further seizure activity throughout the rest of her hospitalization.
He was treated with vancomycin for 8 days and meropenem for 17 days, after which he defervesced. Nevertheless, fevers recurred on hospital day 20 and shortly after; blood cultures returned with gram-negative rods at which point vancomycin and cefepime were reinitiated.
This included intravenous hydration, ibuprofen, and acetaminophen for 48 hours as an inpatient until his fever defervesced. He was discharged in improved condition.
The patient eventually defervesced and experienced a notable alleviation of her headache and myalgias.