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Related to spinthariscope: Crookes tube
A device for observing individual scintillations produced by ionizing radiation, as one consisting of a tube with a magnifying lens at one end and a phosphorescent screen and speck of radioactive salt at the other.
[Greek spintharis, spark + -scope.]
spin·thar′i·scop′ic (-skŏp′ĭk) adj.
(General Physics) a device for observing ionizing radiation, consisting of a tube with a magnifying lens at one end and a phosphorescent screen at the other. A particle hitting the screen produces a scintillation
[C20: from Greek spintharis a little spark + -scope]