Staining

Gram staining, also called Gram's method, is a method of staining used to differentiate bacterial species into two large groups (gram-positive and gram-negative).

The green fluorescent protein (GFP) is a protein composed of 238 amino acid residues (26.9 kDa) that exhibits bright green fluorescence when exposed to light in the blue to ultraviolet range.

Basophilia is a condition where the basophil quantity is abnormally elevated (more than 1010 basophils per liter of blood).

Alcian blue or alcian blue (/ˈælʃən/) is any member of a family of polyvalent basic dyes, of which the Alcian blue 8G (also called Ingrain blue 1, and C.I. 74240, formerly called Alcian blue 8GX from the name of a batch of an ICI product) has been historically the most common and the most reliable member.

Thionine, also known as thionine acetate or Lauth's violet, is a strongly staining metachromatic dye, featuring a phenothiazine core, that is widely used for biological staining.

An azurophilic granule is a cellular object readily stainable with a Romanowsky stain.

A chromophobe is a histological structure that does not stain readily, and thus appears relatively pale under the microscope.

Biebrich scarlet (C.I. 26905) is a molecule used in Lillie's trichrome.

Phosphotungstic acid (PTA), tungstophosphoric acid (TPA), is a heteropoly acid with the chemical formula H3PW12O40.

Trichrome, meaning "three colour" was used as the name of a staining method (Mallory's trichrome) which differentially coloured erythrocytes orange, muscle red and collagen blue.

Cresyl violet is an organic compound with the chemical formula C19H18ClN3O.