# headcase

> English word · Noun

## Definitions
1. A mentally unbalanced, unpredictable person, especially one who displays aggressive behavior.
2. A genetic sequence that inhibits terminal branching of the trachea and regulates dendrite pruning.

## Etymology
From head + case.

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/headcase