English dictionary
spinthariscope
/sp/I/n'/T//&/r/i/,sk/oU/p/
Definitions, examples, synonyms and antonyms from WordNet 3.0.
noun
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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 α rays are thus rendered visible.
Source: webster1913