spinthariscope

noun
spin·​thar·​i·​scope | \spin-ˈther-ə-ˌskōp, -ˈtha-rə-\

Definition of spinthariscope 

: an instrument for visual detection of alpha particles that consists of a fluorescent screen and a magnifying lens system

First Known Use of spinthariscope

1903, in the meaning defined above

History and Etymology for spinthariscope

Greek spintharis spark + English -scope

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The first known use of spinthariscope was in 1903

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