from The American Heritage® Dictionary of the English Language, 4th Edition
- n. The frequency, under given environmental conditions, with which a specific phenotype is expressed by those individuals with a specific genotype.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The quality or state of being penetrant; power of entering or piercing; penetrating power.
- n. The proportion of individuals carrying a particular variation of a gene that also express an associated trait
from the GNU version of the Collaborative International Dictionary of English
- n. The quality or state of being penetrant; power of entering or piercing; penetrating power or quality.
from The Century Dictionary and Cyclopedia
- n. Same as penetrancy.
penetrate + -ance (Wiktionary)