The Collaborative International Dictionary
Pirarucu
Pirarucu \Pi`ra*ru"cu\, n. [From the native South American name.] (Zo["o]l.) Same as Arapaima.
Wiktionary
pirarucu
n. A fish, the arapaima ((taxlink Arapaima gigas species noshow=1)}.
Usage examples of "pirarucu".
Watching the men around him, he learned how to dive hard with a rock in his hands and how to make snorkels by weaving together the bladders of giant pirarucu fish with slender river reeds.