Phrase guide

three-cornered jack

noun · 2 senses · updated from the 2026-07-25 local source snapshot

Definitions and examples are grouped by meaning. Pronunciation, history, word forms, translations, descendants, synonyms, antonyms, derived terms, and related words appear whenever the source provides them.

Sound

Pronunciation

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1

noun

Meaning 1

A weed of species Emex australis.

Definition source: English Wiktionary via Wiktextract

Usage: Australia

Examples

  • 1901, South Australian Department of Agriculture, South Australian Department of Industry, Journal of Agriculture and Industry of South Australia, Volume 4, page 385, The “Three-cornered jack/Devils thorn” (Emex australis) is believed to be poisonous to them, as many dead locusts are found near to each plant.

Meaning relationships

Synonyms: devils thorns, doublegee

Antonyms: none provided

2

noun

Meaning 2

A seed vessel of this plant, which has three symmetrically arranged thorns and a pointed head.

Definition source: English Wiktionary via Wiktextract

No example sentence was provided for this meaning.

Meaning relationships

Synonyms: none provided

Antonyms: none provided

History

Etymology

No etymology was provided for this word.