noun
Gram stain; Gram staining
A laboratory technique used to classify bacteria into Gram-positive and Gram-negative groups based on cell wall properties.
細菌の分類にはグラム染色がよく使われる。
Gram staining is often used for classifying bacteria.
グラム染色の結果、陽性菌と判定された。
The Gram stain result identified it as a Gram-positive bacterium.