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ATOMIC NUMBER 55
I. (noun)
Sense 1
Meaning:
A soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal
Synonyms:
atomic number 55; caesium; cesium; Cs
Classified under:
Hypernyms ("atomic number 55" is a kind of...):
metal; metallic element (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)
Hyponyms (each of the following is a kind of "atomic number 55"):
cesium 137 (a radioactive isotope of cesium used in radiation therapy)
Holonyms ("atomic number 55" is a substance of...):
pollucite (a rare mineral that is an important source of cesium)
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