グラム陰いん性せい菌きんグラムいんせいきんMeanings1noungram-negative bacteriaTechnical term in microbiology; refers to bacteria that do not retain the crystal violet stain in the Gram staining method.グラム陰いん性せい菌きんは抗こう生せい物ぶっ質しつに耐たい性せいを持もつことがある