1. (noun) strontium, Sr, atomic number 38
a soft silver-white or yellowish metallic element of the alkali metal group; turns yellow in air; occurs in celestite and strontianite
Synonyms: steradian, strontium, atomic number 38
Antonyms: junior
2. (adj) steradian, sr
the unit of solid angle adopted under the Systeme International d'Unites
Synonyms: steradian, strontium, sr, atomic number 38
Antonyms: junior
3. (adj) elder, older, sr.
used of the older of two persons of the same name especially used to distinguish a father from his son
Synonyms: senior, aged, old, older, sr., elder, elderly
Antonyms: junior
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Synonyms for sr. 
