| ruthenium |
a rare polyvalent metallic element of the platinum group; it is found associated with platinum
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| rutherford |
a unit strength of a radioactive source equal to one million disintegrations per second British chemist who isolated nitrogen (1749-1819) British physicist (born in New Zealand) who discovered the atomic nucleus and proposed a nuclear model of the atom (1871-1937)
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| rut |
a groove or furrow (especially one in soft earth caused by wheels) a settled and monotonous routine that is hard to escape; "they fell into a conversational rut" be in a state of sexual excitement; of male mammals estrus: applies to nonhuman mammals: a state or period of heightened sexual arousal and activity furrow: hollow out in the form of a furrow or groove; "furrow soil"
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| Ruta |
type genus of the Rutaceae; strong-scented Eurasian herbs
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| Rutherford atom |
first modern concept of atomic structure; all of the positive charge and most of the mass of the atom are contained in a compact nucleus; a number of electrons (equal to the atomic number) occupy the rest of the volume of the atom and neutralize the positive charge
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