VACCINE, adjective [Latin vaccinus, from vacca, a cow.]
Pertaining to cows; originating with or derived from cows; as the vaccine disease or cow-pox.
— American Dictionary of the English Language, 1828
A product that stimulates a person’s immune system to produce immunity to a specific disease.
— CDC, August 2021
A preparation that is used to stimulate the body’s immune response against diseases.
— CDC, September 2021
Injection of a killed or weakened infectious organism in order to prevent the disease.
—CDC, until 2015
The act of introducing a vaccine into the body to produce immunity to a specific disease.
—CDC, 2015 – August 2021
The act of introducing a vaccine into the body to produce protection from a specific disease.
—CDC, September 2021
A native of America; originally applied to the aboriginals, or copper-colored races, found here by the Europeans; but now applied to the descendants of Europeans born in America.
American Dictionary of the English Language, 1828