anaconda
Concise Oxford English Dictionary © 2008 Oxford University Press:
anaconda /ˌanəˈkɒndə/
▶noun a very large semiaquatic snake of the boa family, native to tropical South America. [Eunectes murinus and other species.]
– origin C18 (orig. denoting a kind of Sri Lankan snake): alt. of L. anacandaia ‘python’, from Sinhalese henakaňdayā.
'anaconda' also found in these Oxford entries:

