eunectes

from The Century Dictionary.

• noun A genus of enormous South American serpents, of the family Boidæ, or boas. E. murinus is the anaconda (which see).
• noun A genus of water-beetles, of the family Dytiscidæ, containing about 12 species, of Europe, Asia, Australia, and South America.

from the GNU version of the Collaborative International Dictionary of English.

• noun a genus of boas consisting of anacondas, large South American snakes that may grow to 25 feet.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun anacondas