Akademik

counter tube
noun
a measuring instrument for counting individual ionizing events
Hypernyms: ↑measuring instrument, ↑measuring system, ↑measuring device
Hyponyms: ↑crystal counter, ↑Geiger counter, ↑Geiger-Muller counter, ↑proportional counter tube, ↑proportional counter, ↑scintillation counter

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noun
Etymology: counter (II)
: counting tube

Useful english dictionary. 2012.