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rhodolite |
Noun
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a red or pink variety of garnet used as a gemstone |
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radioactive material |
Noun
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material that is radioactive |
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radioactive waste |
Noun
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useless radioactive materials that are left after some laboratory or commercial process is completed |
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raphia |
Noun
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leaf fibers of the raffia palm tree |
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raffinose |
Noun
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a trisaccharide that occurs in sugar beets and cotton seeds and certain cereals |
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raveling |
Noun
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a bit of fiber that has become separated from woven fabric |
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ravelling |
Noun
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a bit of fiber that has become separated from woven fabric |
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red lead |
Noun
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a reddish oxide of lead (Pb3O4) used as a pigment in paints and in glass and ceramics |
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red tide |
Noun
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seawater that is discolored by large numbers of certain dinoflagellates that produce saxitoxin |
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reductase |
Noun
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an enzyme that catalyses the biochemical reduction of some specified substance |
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renin |
Noun
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a proteolytic enzyme secreted by the kidneys |
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rennin |
Noun
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an enzyme that occurs in gastric juice |
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ruby spinel |
Noun
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a spinel used as a gemstone (usually dark red) |
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rubicelle |
Noun
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a yellow or orange variety of ruby spinel |
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reagin |
Noun
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an immunoglobulin E that is formed as an antibody against allergens (such as pollen) |
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resolvent |
Noun
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a liquid substance capable of dissolving other substances |
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render |
Noun
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a substance similar to stucco but exclusively applied to masonry walls |
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render |
Verb
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cause to become |
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render |
Verb
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melt (fat or lard) in order to separate out impurities |
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render |
Verb
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restate (words) from one language into another language |
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render |
Verb
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bestow |
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render |
Verb
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pass down |
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render |
Verb
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coat with plastic or cement |
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render |
Verb
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give or supply |
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render |
Verb
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show in, or as in, a picture |
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render |
Verb
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give an interpretation or rendition of |
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render |
Verb
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to surrender someone or something to another |
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render |
Verb
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give back |
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render |
Verb
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make over as a return |
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render |
Verb
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give something useful or necessary to |
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rhesus factor |
Noun
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a blood group antigen possessed by Rh-positive people |
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rhodopsin |
Noun
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a red photopigment in the retinal rods of vertebrates |
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retinal purple |
Noun
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a red photopigment in the retinal rods of vertebrates |
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retinol |
Noun
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an unsaturated alcohol that occurs in marine fish-liver oils and is synthesized biologically from carotene |
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raw umber |
Noun
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greenish brown pigment |
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rensselaerite |
Noun
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a kind of soft talc |
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roofing tile |
Noun
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a thin flat slab of fired clay used for roofing |
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racemic acid |
Noun
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the optically inactive form of tartaric acid that is often found in grape juice |
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raw wood |
Noun
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wood that is not finished or painted |
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riboflavin |
Noun
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a B vitamin that prevents skin lesions and weight loss |
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raw wool |
Noun
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wool in its natural condition |
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residence time |
Noun
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the period of time spent in a particular place |
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rest day |
Noun
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a day set aside for rest |
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rain date |
Noun
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an alternative date set for some outdoor event in case it rains on the appointed date |
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religious festival |
Noun
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a festival having religious significance |
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round-trip light time |
Noun
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the elapsed time it takes for a signal to travel from Earth to a spacecraft (or other body) and back to the starting point |
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rag week |
Noun
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a week at British universities during which side-shows and processions of floats are organized to raise money for charities |
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rag day |
Noun
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a day on which university students hold a rag |
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red-letter day |
Noun
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a memorably happy or noteworthy day (from the custom of marking holy days in red on church calendars) |
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religious holiday |
Noun
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a day specified for religious observance |