Hyperpyrexia

noun

noun ·Rare ·Advanced level

Definitions

Noun
  1. 1
    An excessive and unusual elevation of set body temperature greater than or equal to 41°C (105.8°F), or extremely high fever. countable, uncountable
  2. 2
    extremely high fever (especially in children) wordnet

Synonyms

All synonyms
deliriumfeverfireflushheathectic

Etymology

From hyper- + pyrexia.

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.