| caesium | (noun) a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal | Synonyms: atomic number 55, cesium, Cs |
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| cesium | (noun) a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal | Synonyms: atomic number 55, caesium, Cs |
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| dysprosium | (noun) a trivalent metallic element of the rare earth group; forms compounds that are highly magnetic | Synonyms: atomic number 66, Dy |
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| gymnasium | (noun) athletic facility equipped for sports or physical training | Synonyms: gym |
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| hassium | (noun) a radioactive transuranic element, with atomic number 108 | Synonyms: atomic number 108, element 108, Hs |
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| indusium | (noun) a membrane enclosing and protecting the developing spores especially that covering the sori of a fern | - |
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| magnesium | (noun) a light silver-white ductile bivalent metallic element; in pure form it burns with brilliant white flame; occurs naturally only in combination (as in magnesite and dolomite and carnallite and spinel and olivine) | Synonyms: atomic number 12, Mg |
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| perimysium | (noun) the sheath of connective tissue that covers a bundle of muscle fibers | - |
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| potassium | (noun) a light soft silver-white metallic element of the alkali metal group; oxidizes rapidly in air and reacts violently with water; is abundant in nature in combined forms occurring in sea water and in carnallite and kainite and sylvite | Synonyms: atomic number 19, K |
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| symposium | (noun) a meeting or conference for the public discussion of some topic especially one in which the participants form an audience and make presentations | - |
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