from The American Heritage® Dictionary of the English Language, 4th Edition
- n. A preparation of a weakened or killed pathogen, such as a bacterium or virus, or of a portion of the pathogen's structure that upon administration stimulates antibody production or cellular immunity against the pathogen but is incapable of causing severe infection.
- n. A preparation from the cowpox virus that protects against smallpox.
- n. Computer Science A software program designed to detect and stop the progress of computer viruses.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A substance given to stimulate the body's production of antibodies and provide immunity against a disease, prepared from the agent that causes the disease, or a synthetic substitute.
from the GNU version of the Collaborative International Dictionary of English
- adj. Of or pertaining to cows; pertaining to, derived from, or caused by, vaccinia.
- adj. Of or pertaining to a vaccine or vaccination.
- n. The virus of vaccinia used in vaccination.
- n. any preparation used to render an organism immune to some disease, by inducing or increasing the natural immunity mechanisms. Prior to 1995, such preparations usually contained killed organisms of the type for which immunity was desired, and sometimes used live organisms having attenuated virulence. Since that date, preparations containing only specific antigenic portions of the pathogenic organism have also been used. Some of these are prepared by genetic engineering techniques.
- n. A program designed to protect a computer from software viruses, by detecting and or eliminating them.
from The Century Dictionary and Cyclopedia
- Of or pertaining to cows; derived from cows: as, the vaccine disease, or cowpox.
- Of or relating to vaccinia or vaccination.
- n. The virus of cowpox or vaccinia, used in the process of vaccination as a preventive of smallpox.
- n. In a general sense, the modified virus of any specific disease introduced into the body by inoculation, with a view to prevent or mitigate a threatened attack of that disease or to confer immunity against subsequent attacks.
- n. Also vaccin.
from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
- n. immunogen consisting of a suspension of weakened or dead pathogenic cells injected in order to stimulate the production of antibodies
From Latin vaccīnus, of cows, from vacca, cow.(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin vaccinus, from vacca ("cow") (because of early use of the cowpox virus against smallpox). Cf. New or Scientific Latin (variola) vaccīna, or "cowpox". (Wiktionary)