Papanicolaou Staining Method

**Semantic type:** Laboratory Procedure

**Definition:** A microscopy staining method that utilizes a mixture of dyes including hematoxylin, orange G (OG), and eosin azure, which contains variable portions of Eosin Y, light green SF yellowish, and Bismarck brown Y. This multichromatic staining method is used to differentially stain samples containing mixed cell populations.

**Synonyms:** - PAP STAIN - PAP Stain - Papanicolau Stain