penetr
21penetrance — [pen′i trəns] n. [< PENETR(ATE) + ANCE] Genetics the degree of regularity with which a gene produces its specific effect in its carriers in a population …
22penetrometer — ☆ penetrometer [pen΄i träm′ət ər ] n. [< PENETR(ATE) + O + METER] 1. an instrument used to measure the hardness of a substance by inserting a needle into the substance in a prescribed manner 2. an instrument that measures the penetrating power …
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