immunity arising from exposure to antigens.
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Compare natural immunity.
Origin of acquired immunity
First recorded in 1930–35
Words nearby acquired immunity
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2020
British Dictionary definitions for acquired immunity
the immunity produced by exposure of an organism to antigens, which stimulates the production of antibodies
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
Medical definitions for acquired immunity
Immunity obtained either from the development of antibodies in response to exposure to an antigen, as from vaccination or an attack of an infectious disease, or from the transmission of antibodies, as from mother to fetus through the placenta or the injection of antiserum.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Scientific definitions for acquired immunity
Immunity that is not inherited. Acquired immunity can be active or passive.♦ Active immunity results from the development of antibodies in response to an antigen, as from exposure to an infectious disease or through vaccination.♦ Passive immunity results from the transmission of antibodies, as from mother to fetus through the placenta or by the injection of antiserum.
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.