Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun A gas-filled enclosure containing positive and negative electrodes that measures the amount of radiation passing through it by measuring the electric charge generated when the ions created by the radiation migrate to the electrodes.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- noun a measuring instrument that measures the amount of ionizing radiation
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