ATOMIC NUMBER 55

 Dictionary entry overview: What does atomic number 55 mean? 

• ATOMIC NUMBER 55 (noun)
  The noun ATOMIC NUMBER 55 has 1 sense:

1. a soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal

  Familiarity information: ATOMIC NUMBER 55 used as a noun is very rare.

 Dictionary entry details 

• ATOMIC NUMBER 55 (noun)

Sense 1

Meaning:

A soft silver-white ductile metallic element (liquid at normal temperatures); the most electropositive and alkaline metal

Classified under:

Nouns denoting substances

Synonyms:

atomic number 55; caesium; cesium; Cs

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)