The term hamadryad has several uses:
Hamadryad, a kind of nymph in Greek mythology Hamadryad, another term for the king cobra Hamadryas baboon, a species of baboon Hamadryad, an alien species in Alastair Reynolds's novel Revelation Space Hamadryad, progressive rock band from Canada Hamadryad, a character introduced in Robert A. Heinlein's novel Time Enough for Love Hamadryad, a natural history journal from India Hamadryad, the common name of the butterfly species Tellervo zoilus, endemic to far north Queensland in Australia Three British warships named HMS Hamadryad Royal Hamadryad Hospital, Cardiff