three-cornered jack
The term "three-cornered jack" refers to the weed Emex australis, which is known for its invasive nature and sharp, spiny seed vessels.
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Definition
C1Botany
(technical, regional)A herbaceous plant, Emex australis, native to South Africa but invasive in regions like Australia, characterized by sharp, spiny seed vessels.
Example
- The three-cornered jack is a problematic weed in many Australian farmlands.
B2Botany
(informal, regional)The spiny fruit produced by the Emex australis plant, known for its three sharp thorns.
Example
- Be careful when walking barefoot; the three-cornered jack's seed vessels can be painful.
Similar
Terms that have similar or relatively close meanings to "three-cornered jack":
monkey jackyellow jackjumping jackjack aroundjack injack into