Ma'anar ma'anar kalmar "antibody" furotin da ke samar da tsarin rigakafi da aka ba da amsa ga wani abu daga baya abu, wanda ake kira antigen. Abubuwan rigakafi suna iya yin hanawa ko kawar da antigens, kamar ƙwayoyin cuta, ƙwayoyin cuta, da sauran abubuwa masu cutarwa. Su muhimmin bangare ne na kare jikin mutum game da cututtukan cututtukan dafections da cututtuka.
