|Origin:||, past participle of inoculare 'to attach a bud to a plant', from oculus 'eye, bud'|
to protect someone against a disease by putting a weak form of the disease into their body using a needle [↪ immunize, vaccinate]
inoculate somebody against something
All the children had been inoculated against hepatitis.
—inoculation noun [uncountable and countable]