/ˈinkyəˌbāt/
Verb
1. To brood, raise, or maintain eggs, organisms, or living tissue through the provision of ideal environmental conditions. (wiktionary.org)
2. To sit on (eggs) to provide heat, so as to promote embryonic development and the hatching of young; brood. (thefreedictionary.com)
3. To maintain (eggs, organisms, or living tissue) at optimal environmental conditions for growth and development. (thefreedictionary.com)
4. To maintain (a chemical or biochemical system) under specific conditions in order to promote a particular reaction. (thefreedictionary.com)
5. Have an infectious disease developing inside one before symptoms appear. (Google Dictionary)
Word origin: From Latin incubatus, past participle of incubare “to lie in or upon”