WordNet Dictionary- [n] large cobra of southeastern Asia and the East Indies; the largest venomous snake; sometimes placed in genus Naja
- [n] the nymph or spirit of a particular tree
Webster's 1913 Dictionary\Ham"a*dry`ad\, n.; pl. E. {Hamadryads}, L.
{Hamadryades}. [L. Hamadryas, -adis, Gr. ?; ? together + ?
oak, tree: cf. F. hamadryade. See {Same}, and {Tree}.]
1. (Class. Myth.) A tree nymph whose life ended with that of
the particular tree, usually an oak, which had been her
abode.
2. (Zo["o]l.) A large venomous East Indian snake
({Orhiophagus bungarus}), allied to the cobras.