SR

Pronunciation (US):

(GB):

IPA (US):

 Dictionary entry overview: What does Sr mean? 

• SR (noun)
  The noun SR has 2 senses:

1. a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite

2. the unit of solid angle adopted under the Systeme International d'Unites

  Familiarity information: SR used as a noun is rare.

 Dictionary entry details 

• SR (noun)

Sense 1

Meaning:

A soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite

Classified under:

Nouns denoting substances

Synonyms:

atomic number 38; Sr; strontium

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)

Sense 2

Meaning:

The unit of solid angle adopted under the Systeme International d'Unites

Classified under:

Nouns denoting quantities and units of measure

Synonyms:

sr; steradian

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)