Hamadryad
Hamadryad (ham"ȧ*drī`ad) , noun
[Latin Hamadryas, -adis, Greek "Amadrya`s; "a`ma together + dry^s oak, tree: compare French hamadryade. See Same, and Tree.]
1.
(Class. Mythology) A tree nymph whose life ended with that of the particular tree, usually an oak, which had been her abode.
2.
(Zoology) A large venomous East Indian snake (Ophiophagus bungarus), allied to the cobras.