免めん疫えき系けいMeaningsNoun1. immune systemKanji used免be exempt疫epidemic系lineageComposed of免めん疫えきimmunity; immunization; immunisation; being hardened (to); being unaffected (by); being accustomed (to)Noun系けいsystem; lineage; group; corollary; system (range of strata that correspond to a particular time period); (taxonomical) seriesNoun