Synonyms/Hypernyms (Ordered by Estimated Frequency) of noun atomic_number_20

1 sense of atomic number 20

Sense 1
calcium, Ca, atomic number 20 -- (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)
       => metallic element, metal -- (any of several chemical elements that are usually shiny solids that conduct heat or electricity and can be formed into sheets etc.)