[ vak-sin-ee-uh ]
/ vækˈsɪn i ə /


a variant of the cowpox virus that became established in vaccines derived from cowpox-inoculated humans.
Pathology. an acute infection caused by inoculation with vaccinia virus as a prophylactic against smallpox, characterized by localized pustular eruptions.

Origin of vaccinia

From New Latin, dating back to 1800–10; see origin at vaccine, -ia

Related forms

vac·cin·i·al, adjective Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for vaccinia

British Dictionary definitions for vaccinia


/ (vækˈsɪnɪə) /


a technical name for cowpox

Derived Forms

vaccinial, adjective

Word Origin for vaccinia

C19: New Latin, from Latin vaccīnus of cows
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for vaccinia


[ văk-sĭnē-ə ]


An infection induced in humans by inoculation with the vaccinia virus in order to confer resistance to smallpox; it is usually limited to the site of inoculation.primary reaction

Related forms

vac•cini•al adj.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.