febrile

adjective

fe·​brile ˈfe-ˌbrī(-ə)l How to pronounce febrile (audio)
also
ˈfē- How to pronounce febrile (audio)
: marked or caused by fever : feverish
a febrile reaction caused by an allergy

Did you know?

Not too surprisingly, febrile originated in the field of medicine. We note its first use in the work of the 17th-century medical reformer Noah Biggs. Biggs used it in admonishing physicians to care for their "febrile patients" properly. Both feverish and febrile are from the Latin word for "fever," which is febris. Nowadays, febrile is used in medicine in a variety of ways, including references to such things as "the febrile phase" of an illness. And, like feverish, it also has an extended sense, as in "a febrile emotional state."

Examples of febrile in a Sentence

Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
In the febrile political atmosphere of Brazil, Wanderley’s public suicide inevitably had partisan implications. Jon Lee Anderson, New Yorker, 7 Apr. 2025 The risk of a febrile seizure six to 14 days after MMR vaccination goes up slightly for children younger than 7 years old, to one in every 3,000 to 4,000 children. Matt Robison, Newsweek, 18 Feb. 2025 Instead the media was caught up in a febrile narrative about Muslims that was just beginning to build momentum. Mohammad Ali, WIRED, 14 Apr. 2020 But with emotive elections coming in Germany next week, a febrile atmosphere in the U.S. under Donald Trump, and ongoing conflicts in the Middle East and Ukraine, political shadows seem inevitable. Andreas Wiseman, Deadline, 13 Feb. 2025 See All Example Sentences for febrile

Word History

Etymology

Medieval Latin febrilis, from Latin febris fever

First Known Use

1651, in the meaning defined above

Time Traveler
The first known use of febrile was in 1651

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Cite this Entry

“Febrile.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/febrile. Accessed 17 Apr. 2025.

Medical Definition

febrile

adjective
fe·​brile
ˈfeb-ˌrīl also ˈfēb-
: marked or caused by fever : feverish
Last Updated: - Updated example sentences
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