noun ·Rare ·Advanced level

Definitions

Noun

1. 1
   phrenitis archaic, uncountable
2. 2
   inflammation of the brain usually caused by a virus; symptoms include headache and neck pain and drowsiness and nausea and fever (‘phrenitis’ is no longer in scientific use) wordnet
3. 3
   phrenitis; encephalitis archaic, uncountable

Synonyms

All synonyms

encephalitisencephalitisphrenitis

Etymology

From cephal- + -itis.

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