hamadryad /hæməˈdɹaɪæd/ noun4 •A wood-nymph who was physically a part of her tree; she would die if her tree were felled.One of the most interesting species of Nymphs is the Dryads, or Hamadryads, those personifications of the vegetable life of plants. — 1828 •A king cobra. •A baboon of species Papio hamadryas, venerated by the ancient Egyptians. •Any of various nymphalid butterflies of the genera Hamadryas and Tellervo. formshamadryades · hamadryads