hematochrome

from The Century Dictionary.

• noun The red coloring-matter of the eye-spot or stigma of the Flagellata and other Protozoa.
• noun The red coloring-matter of Sphærella and a few other algæ. It is contained in an oily solution instead of a chromatophore.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• noun a reddish coloring material found in some algae