STRONTIUM
Stron"ti*um, n. Etym: [NL. See Strontia.] (Chem.)
Defn: 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.
STROOK
Strook, obs.
Defn: imp. of Strike. Dryden.
STROOK
Strook, n.
Defn: A stroke. [Obs.] Chaucer.
STROOT
Stroot, v. t. Etym: [Cf. Strut, v. i.]
Defn: To swell out; to strut. [Obs.] Chapman.
STROP
Strop, n. Etym: [See Strap.]
Defn: A strap; specifically, same as Strap, 3.