sr
noun
1 Sr
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, strontium.
Dutch: strontium
Polish: stront, Sr
2 sr
The unit of solid angle adopted under the Systeme International d'Unites.
synonym: steradian.
Dutch: steradiaal
Polish: steradian, sr
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