nounplural noun pacu
A deep-bodied herbivorous freshwater fish native to northern South America, which has been introduced into the Old World.
Colossoma nigripinnis, family Characidae‘Are the vegetarian pacu's teeth different from the carnivorous piranha's teeth?’
- ‘The introduction of these exotic species, such as the pacu, can have detrimental effects for native species inhabiting South Carolina waters.’
- ‘Additionally, full-grown pacu are much larger than piranha.’
Late 18th century from Tupi pacú.
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