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Hint: Wildcards can be used multiple times in a query.
English
noun
:
electron multiplier
1.
electron multiplier
(artifact)
a vacuum tube that amplifies a flow of electrons
Broader (hypernym)
electron tube
,
thermionic tube
,
thermionic vacuum tube
,
thermionic valve
,
tube
,
vacuum tube
Based on WordNet 3.0 copyright © Princeton University.
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. English edition:
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.
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