n. An infection of cowpox; or the virus which causes this infection
the GNU version of the Collaborative International Dictionary of English
n. Cowpox; vaccina. See cowpox.
The Century Dictionary and Cyclopedia
n. A specific eruptive disease occurring in cattle, especially in milch cows.
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
n. a viral disease of cattle causing a mild skin disease affecting the udder; formerly used to inoculate humans against smallpox
n. a local infection induced in humans by inoculation with the virus causing cowpox in order to confer resistance to smallpox; normally lasts three weeks and leaves a pitted scar
Word Usage
"(The smallpox vaccine is based on a live virus called vaccinia, which is closely related to the smallpox virus and protects against it, but normally does not cause disease itself.)"