from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A large South American freshwater food fish (Arapaima gigas) that typically attains a length of 3 meters (10 feet). Also called pirarucu.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A large carnivorous predatory South American tropical freshwater fish, Arapaima gigas. It is the largest scaled freshwater fish in the world. It is a primitive fish.
from the GNU version of the Collaborative International Dictionary of English
- n. A large fresh-water food fish of South America.
from The Century Dictionary and Cyclopedia
- n. The name of the largest known fresh-water fish, Arapaima gigas, an inhabitant of Brazil and Guiana, said to attain a length of 15 feet and a weight of 400 pounds. It is of economical importance as a food-fish.
- n. [capitalized] [NL.] A genus of malacopterygian abdominal fishes, of the family Osteoglossidœ, remarkable for their size and the mosaic work of their hard bony compound scales. A. gigas is an example.
American Spanish or Portuguese, both probably of Tupian origin .(American Heritage® Dictionary of the English Language, Fourth Edition)