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2 definitions found

From: Webster's Revised Unabridged Dictionary (1913)

 Crookes tube Phys. A vacuum tube in which the exhaustion is carried to a very high degree, with the production of a distinct class of effects; -- so called from W. Crookes who introduced it.
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From: WordNet (r) 2.0

 Crookes tube
      n : the original gas-discharge cathode-ray tube