(greek & roman mythology) A wood nymph who lives only as long as the tree of which she is the spirit lives.
(gr. myth.) A dryad; specif., a wood nymph whose life is bound up with that of the tree in which she lives.
An Arabian and N African baboon (Papio hamadryas) with ashy-gray fur.
The king cobra.
Origin of hamadryad
From American Heritage Dictionary of the English Language, 5th Edition