/iˈnäkyəˌlāt/
Verb
1. To introduce an antigenic substance or vaccine into the body to produce immunity to a specific disease. (wiktionary.org)
2. To introduce a serum, vaccine, or antigenic substance into (the body of a person or animal), especially to produce or boost immunity to a specific disease (thefreedictionary.com); treat (a person or animal) with a vaccine to produce immunity against a disease. (Google Dictionary)
3. To safeguard or protect something as if by inoculation. (wiktionary.org)
4. To implant microorganisms or infectious material into (a culture medium). (thefreedictionary.com)
5. To add one substance to another. To spike. (wiktionary.org)
6. To graft by inserting buds. (wiktionary.org)
Word origin: From Latin inoculatus, past participle of inoculare “graft in, implant,” from in- “in” + oculus “bud,” originally “eye.”