radius
— Noun
– English
～ the length of a line segment between the center and circumference of a circle or sphere
radius
— Noun
– English
～ a straight line from the center to the perimeter of a circle (or from the center to the surface of a sphere)
radius of curvature
— Noun
– English
～ the radius of the circle of curvature; the absolute value of the reciprocal of the curvature of a curve at a given point
radix
— Noun
– English
～ (numeration system) the positive integer that is equivalent to one in the next higher counting place; "10 is the radix of the decimal system"
radome
— Noun
– English
～ a housing for a radar antenna; transparent to radio waves
radon
— Noun
– English
～ a radioactive gaseous element formed by the disintegration of radium; the heaviest of the inert gasses; occurs naturally (especially in areas over granite) and is considered a hazard to health
Radyera
— Noun
– English
～ very small genus of shrubs of southern hemisphere: bush hibiscus
Radyera farragei
— Noun
– English
～ southern and western Australian shrub with unlobed or shallowly lobed toothed leaves and purple flowers; sometimes placed in genus Hibiscus
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
RAF
— Noun
– English
～ a Marxist and Maoist terrorist organization in Germany; a network of underground guerillas who committed acts of violence in the service of the class struggle; a successor to the Baader-Meinhof Gang; became one of Europe's most feared terrorist groups; disbanded in 1998
raf
— Noun
– English
～ the airforce of Great Britain
raffia
— Noun
– English
～ leaf fibers of the raffia palm tree; used to make baskets and mats etc.
raffia
— Noun
– English
～ fiber of a raffia palm used as light cordage and in making hats and baskets
raffia palm
— Noun
– English
～ a large feather palm of Africa and Madagascar having very long pinnatisect fronds yielding a strong commercially important fiber from its leafstalks
Raffia
— Noun
– English
～ feather palm of tropical Africa and Madagascar and Central and South America widely grown for commercial purposes
Raffia farinifera
— Noun
– English
～ a large feather palm of Africa and Madagascar having very long pinnatisect fronds yielding a strong commercially important fiber from its leafstalks
raffinose
— Noun
– English
～ a trisaccharide that occurs in sugar beets and cotton seeds and certain cereals
raffish
— Adjective
– English
～ marked by a carefree unconventionality or disreputableness; "a cocktail party given by some...raffish bachelors"- Crary Moore
raffish
— Adjective
– English
～ marked by up-to-dateness in dress and manners; "a dapper young man"; "a jaunty red hat"
raffishly
— Adverb
– English
～ in a rakish manner; "she wore her hat rakishly at an angle"