ATOMIC NUMBER 20

 Dictionary entry overview: What does atomic number 20 mean? 

• ATOMIC NUMBER 20 (noun)
  The noun ATOMIC NUMBER 20 has 1 sense:

1. a white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals

  Familiarity information: ATOMIC NUMBER 20 used as a noun is very rare.

 Dictionary entry details 

• ATOMIC NUMBER 20 (noun)

Meaning:

A white metallic element that burns with a brilliant light; the fifth most abundant element in the earth's crust; an important component of most plants and animals

Classified under:

Nouns denoting substances

Synonyms:

atomic number 20; Ca; calcium

Hypernyms ("atomic number 20" 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 20"):

calcium ion; factor IV (ion of calcium; a factor in the clotting of blood)

Holonyms ("atomic number 20" is a substance of...):

fluor; fluorite; fluorspar (a soft mineral (calcium fluoride) that is fluorescent in ultraviolet light; chief source of fluorine)

gypsum (a common white or colorless mineral (hydrated calcium sulphate) used to make cements and plasters (especially plaster of Paris))

burnt lime; calcined lime; calcium oxide; calx; fluxing lime; lime; quicklime; unslaked lime (a white crystalline oxide used in the production of calcium hydroxide)

limestone (a sedimentary rock consisting mainly of calcium that was deposited by the remains of marine animals)