sr

Noun
  1. A soft silver-white or yellowish metallic element of the alkali metal group;
    Turns yellow in air;
    Occurs in celestite and strontianite (synset 114679910)
    is a 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.
    subtypes: strontium 90 - a radioactive isotope of strontium (with the mass number 90) that is present in the fallout from nuclear explosions; can be assimilated like calcium into bones
    substance meronym:
    • celestite - a mineral consisting of strontium sulphate
    • strontianite - a mineral consisting of strontium carbonate
    same as: atomic number 38, strontium
  2. The unit of solid angle adopted under the Systeme International d'Unites (synset 113634034)
    is a type of: angular unit - a unit of measurement for angles
    is a part of: sphere - a three-dimensional closed surface such that every point on the surface is equidistant from the center
    same as: steradian

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