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| pen·e·trom·e·ter [ pènnə trómmətər ] (plural pen·e·trom·e·ters) or pen·e·tram·e·ter [ pènnə trámmətər ] (plural pen·e·tram·e·ters) |
noun |
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| Definition: |
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1. instrument for measuring radiation: an instrument for measuring the penetrating power of electromagnetic radiation, e.g. gamma radiation in contaminated soils
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2. device for measuring firmness: an instrument for measuring the penetrability of a solid material by measuring the depth to which it may be pierced with a standard needle
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| [Early 20th century. <penetration] |
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