Dictionary

All Word
radium Noun an intensely radioactive metallic element that occurs in minute amounts in uranium ores
radon Noun a radioactive gaseous element formed by the disintegration of radium
rhenium Noun a rare heavy polyvalent metallic element that resembles manganese chemically and is used in some alloys
rhodium Noun a white hard metallic element that is one of the platinum group and is found in platinum ores
roentgenium Noun a radioactive transuranic element
rubidium Noun a soft silvery metallic element of the alkali metal group
ruthenium Noun a rare polyvalent metallic element of the platinum group
rutherfordium Noun a radioactive transuranic element which has been synthesized
radiocarbon Noun a radioactive isotope of carbon
rare earth Noun any element of the lanthanide series (atomic numbers 57 through 71)
rare-earth element Noun any element of the lanthanide series (atomic numbers 57 through 71)
radiochlorine Noun a radioactive isotope of chlorine
rock salt Noun naturally occurring crystalline sodium chloride
radiothorium Noun radioactive isotope of thorium with mass number 228
rocket propellent Noun an explosive charge that propels a rocket
red-lead putty Noun a cement resembling putty
rubber cement Noun an adhesive made by dissolving unvulcanized rubber in a solvent like benzene or naphtha
rock crystal Noun a clear quartz used in making electronic and optical equipment
rhinestone Noun an imitation diamond made from rock crystal or glass or paste
rag paper Noun paper made partly or wholly from rags
reactant Noun a chemical substance that is present at the start of a chemical reaction
realgar Noun a rare soft orange mineral consisting of arsenic sulphide
red clay Noun clay whose redness results from iron oxide
red fire Noun combustible material (usually salts of lithium or strontium) that burns bright red
regosol Noun a type of soil consisting of unconsolidated material from freshly deposited alluvium or sand
regur Noun a rich black loam of India
regur soil Noun a rich black loam of India
residual soil Noun the soil that is remaining after the soluble elements have been dissolved
residual clay Noun the soil that is remaining after the soluble elements have been dissolved
resinoid Noun a plastic containing resins
rhodochrosite Noun a mineral consisting of manganese carbonate
rhodonite Noun a pink or red mineral consisting of crystalline manganese silicate
ribose Noun a pentose sugar important as a component of ribonucleic acid
ricin Noun a toxic protein extracted from castor beans
ricin toxin Noun a toxic protein extracted from castor beans
road metal Noun broken rock used for repairing or making roads
rudaceous rock Noun a sedimentary rock formed of coarse-grained material
rust inhibitor Noun antioxidant that inhibits the formation of rust
recombinant protein Noun a protein derived from recombinant DNA
rocket fuel Noun an explosive charge that propels a rocket
rocket propellant Noun an explosive charge that propels a rocket
ratsbane Noun a white powdered poisonous trioxide of arsenic
rock wool Noun a light fibrous material used as an insulator
rawhide Noun untanned hide especially of cattle
rennet Noun a substance that curdles milk in making cheese and junket
royal jelly Noun a secretion of the pharyngeal glands of bees that is fed to very young larvae and to bees destined to be queens
ricinoleic acid Noun an oily fatty acid found in castor oil and used in soap
reagent Noun a chemical agent for use in chemical reactions
reducing agent Noun a substance capable of bringing about the reduction of another substance as it itself is oxidized
reductant Noun a substance capable of bringing about the reduction of another substance as it itself is oxidized