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pendragon
pendular
pendulous
pendulum
Penelope
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penes
penetralia
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penetrance

pen·e·trance [ pénnətrənss ]


noun 
Definition:
 
frequency of hereditary condition: the frequency with which a hereditary characteristic such as a genetic disease occurs among individuals carrying the gene or genes for that characteristic

[Mid-20th century. < German Penetranz]
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