/ Dictionary / Index P penetrometer: Meaning and Definition of Find definitions for: pen•e•trom•e•ter Pronunciation: (pen"i-trom'i-tur), [key] — n. a device for measuring the penetrating power of x-ray or other radiations. a device for measuring the penetrability of a solid. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. penetrative Peneus Related Content Daily Word Quiz: fervor Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language