rosebay Syllabification: (rose·bay)Pronunciation: /ˈrōzˌbā/Definition of rosebay noun 1North American a rhododendron. Genus Rhododendron, family Ericaceae: several species, including the great rhododendron (R. maximum) of eastern North America 2 (also rosebay willow herb) chiefly British the pink-flowered willow herb Epilobium angustifolium, a common fireweed. rosebay in other Oxford dictionaries Definition of rosebay in the British & World English dictionary
