Spinthariscope
Pronunciation : Spin*thar"i*scope
Part of Speech : n.
Definition : 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.
[Gr. spinqari`s spark + -scope.]
Source : Webster's Unabridged Dictionary, 1913