gamma radiation
— Noun
– English
～ electromagnetic radiation emitted during radioactive decay and having an extremely short wavelength
genus Radiigera
— Noun
– English
～ a genus of fungus belonging to the family Geastraceae
genus Radyera
— Noun
– English
～ very small genus of shrubs of southern hemisphere: bush hibiscus
Genista raetam
— Noun
– English
～ desert shrub of Syria and Arabia having small white flowers; constitutes the juniper of the Old Testament; sometimes placed in genus Genista
genus Raffia
— Noun
– English
～ feather palm of tropical Africa and Madagascar and Central and South America widely grown for commercial purposes
great ragweed
— Noun
– English
～ a coarse annual with some leaves deeply and palmately three-cleft or five-cleft
golden ragwort
— Noun
– English
～ weedy herb of the eastern United States to Texas having golden-yellow flowers; sometimes becomes invasive; sometimes placed in genus Senecio
golden rain
— Noun
– English
～ an ornamental shrub or tree of the genus Laburnum; often cultivated for Easter decorations
genus Raja
— Noun
– English
～ type genus of the family Rajidae
garden rake
— Noun
– English
～ a rake used by gardeners
genus Ramalina
— Noun
– English
～ shrubby lichens of the family Usneaceae having a flattened thallus