in‧ter‧fer‧on /ˌɪntəˈfɪərɒn $ ˌɪntərˈfɪrɑːn/ 
 noun [uncountable][
Date: 1900-2000; 
Origin: interfere + -on chemical compound]
 a chemical substance that is produced by your body to fight against 
viruses that cause disease 
 [TahlilGaran] Dictionary of Contemporary English ▲