The administration of an
antigen to an animal in order to stimulate the production of
antibodies by that organism. Also, the administration of antigens, antibodies or lymphocytes
to an animal to generate the corresponding active, passive or adaptive immunity.
Source:
PAC, 1992, 64, 143
(Glossary for chemists of terms used in biotechnology (IUPAC Recommendations 1992))
on page 157