# three-cornered jack

> English word · Noun

## Definitions
1. A weed of species Emex australis.
2. A seed vessel of this plant, which has three symmetrically arranged thorns and a pointed head.

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