Usually means: Freshwater fish, related to piranhas.
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We found 16 dictionaries that define the word pacu:

General (10 matching dictionaries)
  1. pacu: Oxford Learner's Dictionaries
  2. pacu: Wordnik
  3. pacu: Wiktionary
  4. PACU: Dictionary.com
  5. PACU, Pacu (disambiguation), Pacu: Wikipedia, the Free Encyclopedia
  6. Pacu: Online Plain Text English Dictionary
  7. pacu: Webster's Revised Unabridged, 1913 Edition
  8. Pacu: AllWords.com Multi-Lingual Dictionary
  9. pacu: FreeDictionary.org
  10. Pacu: TheFreeDictionary.com

Medicine (4 matching dictionaries)
  1. PACU: Merriam-Webster Medical Dictionary
  2. Dorland's Illustrated Medical Dictionary (No longer online)
  3. online medical dictionary (No longer online)
  4. Pacu: Medical dictionary

Miscellaneous (2 matching dictionaries)
  1. PACU: Acronym Finder
  2. AbbreviationZ (No longer online)

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Definitions from Wiktionary (pacu)

▸ noun:  Any of several South American freshwater fishes related to the piranha.

Similar:
pirarucu, pirai, piranha, pirambeba, perch, piracatinga, piraya, patwa, pirana, caribe, more...

Types:
red-bellied, dwarf, albino, royal, more...

Adjectives:
black, ambulatory, fine, modern, red

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Similar:
pirarucu, pirai, piranha, pirambeba, perch, piracatinga, piraya, patwa, pirana, caribe, more...

Types:
red-bellied, dwarf, albino, royal, more...

Adjectives:
black, ambulatory, fine, modern, red



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