hamadryad

[ham-uh-drahy-uh d, -ad] /ˌhæm əˈdraɪ əd, -æd/
noun, plural hamadryads, hamadryades
[ham-uh-drahy-uh-deez] /ˌhæm əˈdraɪ əˌdiz/ (Show IPA)
1.
Classical Mythology. a dryad who is the spirit of a particular tree.
2.
king cobra.
Origin
< Latin, stem of Hamādryas wood nymph < Greek, equivalent to hama together with (cognate with same) + dryás dryad
British Dictionary definitions for hamadryad

hamadryad

/ˌhæməˈdraɪəd; -æd/
noun
1.
(classical myth) one of a class of nymphs, each of which inhabits a tree and dies with it
2.
another name for king cobra
Word Origin
C14: from Latin Hamādryas, from Greek Hamadruas, from hama together with + drus tree; see dryad
Word Origin and History for hamadryad
n.

late 14c., from Greek hamadryas (plural hamadryades) "wood-nymph," fabled to die with her tree, from hama "together" (see same) + drus (genitive dryos) "tree."