pyronin
/ˈpʌɪrənɪn/(also pyronine) Chemistry and Biology
noun
Any of a class of synthetic red xanthene dyes employed chiefly as microscopic stains; (in later use) especially either of two such dyes (in full pyronin Gor Y and pyronin B).
Origin
Late 19th century; earliest use found in Journal of the Chemical Society. From German Pyronin, originally a trademark, probably from pyro- + -in, with inserted -n-.