Category:Spinthariscope

Spin*thar"i*scope, n. [gr. spinqari`s spark + -scope.]

Defn: a small instrument containing a minute particle of a radium Compound mounted in front of a fluorescent screen and viewed with Magnifying lenses. The tiny flashes produced by the continual Bombardment of the screen by the a rays are thus rendered visible. -- Spin*thar`i*scop"ic (#), a.