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Definition of: spinthariscope
(spin·thar′ə·skōp) noun
A device for showing the radioactivity of a substance by the scintillations of the alpha rays emitted from a minute particle of the substance and thrown against a fluorescent screen. [<Gk. spintharis spark + SCOPE]
—spin·thar′i·scop′ic (-skop′ik) adjective
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