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SR
| Pronunciation (US): |  | (GB): | |
I. (noun)
Sense 1
Meaning:
The unit of solid angle adopted under the Systeme International d'Unites
Synonyms:
sr; steradian
Classified under:
Nouns denoting quantities and units of measure
Hypernyms ("sr" is a kind of...):
angular unit (a unit of measurement for angles)
Holonyms ("sr" is a part of...):
sphere (a three-dimensional closed surface such that every point on the surface is equidistant from the center)
Sense 2
Meaning:
A soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
Synonyms:
atomic number 38; Sr; strontium
Classified under:
Hypernyms ("Sr" 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 "Sr"):
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)
Holonyms ("Sr" is a substance of...):
celestite (a mineral consisting of strontium sulphate)
strontianite (a mineral consisting of strontium carbonate)
