luciferin: pigment occurring in luminescent organisms (as fireflies); emits heatless light when undergoing oxidation
pigment: dry coloring material (especially a powder to be mixed with a liquid to produce paint, etc.)
kickstand: a swiveling metal rod attached to a bicycle or motorcycle or other two-wheeled vehicle; the rod lies horizontally when not in use but can be kicked into a vertical position as a support to hold the vehicle upright when it is not being ridden