姉し妹まい群ぐんMeanings1nounsister group; sister taxonbiologyTechnical term in phylogenetics for the closest relative(s) of a given taxon.系けい統とう樹じゅでは、チンパンジーはヒトの姉し妹まい群ぐんとされる。In the phylogenetic tree, chimpanzees are considered the sister group of humans.
