Definition of penetrance
: the proportion of individuals of a particular genotype that express its phenotypic effect in a given environment
Origin of penetrance
International Scientific Vocabulary, from Latin penetrare
First Known Use: 1934
Learn More about penetrance
Medical Dictionary: Definition of "penetrance"
Seen and Heard
What made you want to look up penetrance? Please tell us where you read or heard it (including the quote, if possible).