Romanowsky stain
noun
Ro·ma·now·sky stain
variants:
or Romanowsky's stain
also Romanovsky stain
or Romanovsky's stain \ ˌrō-mə-ˈnȯf-skē(z)- 
\
\
Medical Definition of Romanowsky stain
: a stain made from water-soluble eosin, methylene blue, and absolute methanol and used in parasitology