Penetrances

Part of speech: noun

Definitions

1. The act or process of entering or passing through something
2. the degree to which radiation or substances can pass through materials
3. a measure of how deeply something can influence or affect another entity or substance

Etymology: "Penetrances" is the plural of "penetrance," a term from genetics for the proportion of individuals carrying a particular gene variant who actually show its effect. The noun is built from "penetrate," which comes from Latin "penetrare," meaning to enter or go into, plus the suffix "-ance," which turns a verb into a noun of action or state. That suffix reached English through Old French "-ance," itself descended from Latin "-antia," a pattern that also gave English words like "appearance" and "resistance." The word's core idea is literal: to penetrate is to get inside something. "Penetrance" carries that sense of getting through into an effect, so a gene with high penetrance reliably shows its trait in its carriers, while one with low penetrance often stays hidden. The plural form simply counts several such measurements, one for each gene or population being compared.

Synonyms: expressivity, manifestation, expression, occurrence, appearance

Antonyms: nonpenetrance, absence, silence, invisibility