Science Dictionary
penetrometer (pěn'ĭ-trŏm'ĭ-tər) also penetrameter   (pěn'ĭ-trŏm'ĭ-tər)  Pronunciation Key 
  1. A device for measuring the penetrating power of electromagnetic radiation, especially x-rays.

  2. A device for measuring the denseness, compaction, or penetrability of a substance, such as soil, agricultural produce, or semisolid petroleum products. A penetrometer typically measures the resistance of the substance to penetration to a given depth by a weight-driven cone or needle of a given shape.

The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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