革蘭氏陰性 [ㄍㄜˊ ㄌㄢˊ ㄕˋ ㄧㄣ ㄒㄧㄥˋ; ge2 lan2 shi4 yin1 xing4] Gram negative (bacteria that do not retain Gram stain, often the more dangerous kind) ◄ ►