Sr
n 1: a soft silver-white or yellowish metallic element of the
alkali metal group; turns yellow in air; occurs in
celestite and strontianite [syn: strontium, atomic
number 38]
2: the unit of solid angle adopted under the Systeme
International d'Unites [syn: steradian]
sr.
adj : used of the older of two persons of the same name especially
used to distinguish a father from his son; "Bill Adams,
Sr." [syn: elder, older]