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pen·e·trom·e·ter(pĕn′ĭ-trŏm′ĭ-tər) also pen·e·tram·e·ter (-trăm′ĭ-tər)
1. A device for measuring the penetrating power of radiation, especially x-rays.
2. A device for measuring the penetrability of semisolids.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
(General Physics) physics an instrument used to measure the penetrating power of radiation, such as X-rays
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014
an instrument for measuring the degree of penetrability of a solid.See also: Instruments
-Ologies & -Isms. Copyright 2008 The Gale Group, Inc. All rights reserved.