Nouns starting with R

• ruby spinel — Noun – English ～ a spinel used as a gemstone (usually dark red)
• Rosa spithamaea — Noun – English ～ low-growing bristly shrub of southern Oregon and California with creeping rootstocks and usually corymbose flowers
• reverse split — Noun – English ～ a decrease in the number of outstanding shares of a corporation without changing the shareholders' equity
• rail-splitter — Noun – English ～ a laborer who splits logs to build split-rail fences
• rheumatoid spondylitis — Noun – English ～ a chronic form of spondylitis primarily in males and marked by impaired mobility of the spine; sometimes leads to ankylosis
• runcible spoon — Noun – English ～ a fork-like spoon with a cutting edge; coined by Edward Lear
• roseate spoonbill — Noun – English ～ tropical rose-colored New World spoonbill
• resting spore — Noun – English ～ a spore of certain algae or fungi that lies dormant; may germinate after a prolonged period
• round-spored gyromitra — Noun – English ～ a gyromitra with a brown puffed up fertile part and a rosy pink fluted stalk and smooth round spores; found on hardwood slash east of the Great Plains
• rytmisk sportsgymnastik — Noun – Danish ～ gymnastik sammensat af øvelser på gulv til musikle ...
• red-spotted purple — Noun – English ～ similar to the banded purple but with red spots on underwing surfaces
• Rocky Mountain spotted fever — Noun – English ～ caused by rickettsial bacteria and transmitted by wood ticks
• Rock Springs — Noun – English ～ a town of southwest Wyoming near the Utah border
• red sprites — Noun – English ～ atmospheric electricity (lasting 10 msec) appearing as globular flashes of red (pink to blood-red) light rising to heights of 60 miles (sometimes seen together with elves)
• red spruce — Noun – English ～ medium-sized spruce of eastern North America; chief lumber spruce of the area; source of pulpwood
• red squirrel — Noun – English ～ common reddish-brown squirrel of Europe and parts of Asia
• red squirrel — Noun – English ～ of northern United States and Canada
• rock squirrel — Noun – English ～ large grey ground squirrel of rocky areas of the southwestern United States
• Richardson ground squirrel — Noun – English ～ of sagebrush and grassland areas of western United States and Canada
• reef squirrelfish — Noun – English ～ on reefs from Bermuda and Florida to northern South America

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