elephantiasis
Concise Oxford English Dictionary © 2008 Oxford University Press:
elephantiasis /ˌɛlɪf(ə)nˈtʌɪəsɪs/
▶noun Medicine a condition in which a limb becomes grossly enlarged due to obstruction of the lymphatic vessels, especially by nematode parasites.
'elephantiasis' also found in these Oxford entries:

