グラム陽よう性せい菌きんグラムようせいきんMeanings1noungram-positive bacteriaTechnical term in microbiology; bacteria that retain the crystal violet stain in Gram staining.グラム陽よう性せい菌きんはペニシリンに感かん受じゅ性せいを示しめすことが多おおい。Gram-positive bacteria often show sensitivity to penicillin.