- The definition of an australia antigen is a substance in the blood of some people with one form of hepatitus that causes the human body to make antibodies.
HBsAg is the name of the surface molecule that is found in the blood of people with Hepatitus B and is an example of the Australia-antigen.
Australia antigen definition by Webster's New World
Webster's New World College Dictionary Copyright © 2010 by Wiley Publishing, Inc., Cleveland, Ohio. Used by arrangement with John Wiley & Sons, Inc.
an antigen present in the blood of some persons with one form of hepatitis
Origin: because first identified in an Australian Aborigine
australia antigen - Medical Definition