noun, plural: inoculations
Inoculation is the act or process of introducing something to where it will grow or reproduce. It is most commonly used in respect of the introduction of a serum, vaccine, or antigenic substance into the body of a human or animal, especially to produce or boost immunity to a particular disease.
Word origin: Origin: 1400–50; late ME < L inoculātiōn- (s. of inoculātiō), an engrafting.
See also: vaccination.