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Webster 1913 Edition
Strontium
Stron′ti-um
,Noun.
[NL. See
Strontia
.] (Chem.)
A metallic element of the calcium group, always naturally occurring combined, as in the minerals strontianite, celestite, etc. It is isolated as a yellowish metal, somewhat malleable but harder than calcium. It is chiefly employed (as in the nitrate) to color pyrotechnic flames red. Symbol Sr. Atomic weight 87.3.
A radioactive isotope of strontium produced by certain nuclear reactions, and constituting one of the prominent harmful components of radioactive fallout from nuclear explosions; also called radiostrontium
. It has a half-life of 28 years. –>Webster 1828 Edition
Strontium
STRONTIUM
,Noun.