a poisonous, pale yellow solid, OsO4, that has a distinctively pungent, harmful vapour and is used in solution as a biological stain, esp. for…

a solution of picric acid, carmine, and ammonia used as a red histological stain.

A bluish-red dye related to fluorescein, used esp. as a biological stain.

A dye or colouring matter used in staining. A dye or pigment used to render minute and transparent structures visible, or to differentiate tissue…

A red colouring matter obtained from fluorescein by the action of iodine, used in photography and as a histological stain.

As a modifier (also in the genitive). Designating a method of staining used to identify and classify bacteria and certain other microorganisms…

Phenyl-brown, used esp. as a staining matter for histological preparations.

A tetracyclic quaternary ammonium ion, C20H19ON3, which is an azine dye and is used as a pH indicator. Also: a salt of this ion, esp. the…

Any of a class of synthetic red xanthene dyes employed chiefly as microscopic stains; (in later use) esp. either of two such dyes (in full pyronin…

Dye Chemistry. Applied to a group of basic azo dyes that contain a quaternary ammonium group, often with safranine as the diazo component, and…

An additional dye of different colour or sensitivity used in a microscopy specimen to produce a contrasting background to the parts of interest…

a dye which normally stains the cell bodies of neurons, esp. methylene blue; (also) a microscopic specimen stained by Nissl's method.

Used attributively and in the possessive with reference to Leishman's work in pathology. a mixture of eosin and methylene blue used to stain blood…

a diazo dye used as a vital stain and in the treatment of trypanosomiasis and other protozoan infections.

a nitrogen mustard derived from quinacrine, used as a fluorescent stain for chromosomes.