自じ己こ免めん疫えきじこめんえきMeanings1noun, noun which may take the genitive case particle 'no'autoimmunitymedicine›Medical term referring to the immune system attacking the body's own tissues. Often used in compounds like 自己免疫疾患 (autoimmune disease).自じ己こ免めん疫えき疾しっ患かんに