atomic number 27

Definitions of atomic number 27

1. noun

   a hard ferromagnetic silver-white bivalent or trivalent metallic element; a trace element in plant and animal nutrition
   synonyms: Co, cobalt

   types:

   cobalt 60

   a radioactive isotope of cobalt with mass number 60; a source of exceptionally intense gamma rays; used in radiation therapy

   type 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.