Antigen
/ˈæn.tɪ.dʒən/
Definitions
A substance that triggers an immune response, especially the production of antibodies.
/ˈæn.tɪ.dʒən/
A substance that when introduced into the body stimulates the production of an antibody.
The vaccine contains a weakened antigen to stimulate immunity.
💡 Simply: Something that makes your body fight off an infection.
More Examples
Different antigens can cause different types of immune reactions.
How It's Used
"The immune system recognizes the antigen and produces antibodies to neutralize it."
"Research focuses on identifying the specific antigens responsible for autoimmune diseases."
From Ancient Greek ἀντί- (anti-, "against") + γεννάω (gennào, "to produce, to beget"), referring to substances that generate antibodies.
The term 'antigen' emerged in the late 19th century with advancements in immunology.
Memory tip
Think 'anti' (against) and 'gen' (generator) - it generates an immune response against it.
Word Origin
"anti- (against) + gen- (producing)"