Chromogen vs. Chromagen — Which is Correct Spelling?

The term chromogen is applied in chemistry to a colourless (or weakly coloured) chemical compound that can be converted by chemical reaction into a compound which can be described as "coloured". There is no universally agreed definition of the term.

A substance which can be readily converted into a dye or other coloured compound.

(Chemistry) A substance capable of conversion into a pigment or dye.

(Biology) A strongly pigmented or pigment-generating organelle, organ, or microorganism.

(chemistry) Any substance that lacks colour, but can be converted into a pigment or dye.

(biology) A strongly pigmented organelle or organism.

Vegetable coloring matter other than green; chromule.

Any colored compound, supposed to contain one or more chromophores.

A compound that can be converted to a pigment