# incubation period

> English word · Noun

## Definitions
1. The time elapsed between an exposure to a pathogenic organism, a chemical or radiation, and the appearance of signs and symptoms.

## Etymology
Since 1850s, from earlier period of incubation, attested in that now obsolete sense since late 1820s, which is a calque of French période d'incubation (attested since mid-1810s), itself a calque from Latin periodus incubationis (attested since 1770s).

## Source
Compiled from Wiktionary via kaikki.org (CC BY-SA). Data vintage: 2026-05-06.
Canonical page: https://plainspell.com/en/word/incubation-period