dryadPronunciation: /ˈdrʌɪəd, -ad/Definition of dryad noun 1(in folklore and Greek mythology) a nymph inhabiting a tree or wood. 2a dark brown Eurasian butterfly with two prominent bluish eyespots on each forewing. Minois dryas, subfamily Satyrinae, family Nymphalidae Origin:via Old French and Latin from Greek druas, druad- 'tree nymph', from drus 'tree'dryad in other Oxford dictionaries Definition of dryad in the US English dictionary