You know what it looks like… but what is it called?
TAKE THE QUIZ“Gram's”
We have one entry that includes the term Gram's.
Gram's stain
noun: a method for the differential staining of bacteria by treatment with a watery solution of iodine and the iodide of potassium after staining with a triphenylmethane dye (such as crystal violet)
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Merriam-Webster unabridged