» For the geological term, see melanosome (geology)In a biological cell, a melanosome is an organelle containing melanin, the most common light-absorbing pigment found in the animal kingdom. Cells that contain melanosomes are called melanocytes, and also the retinal pigment epithelium cells, whereas cells that have merely engulfed the melanosomes are called melanophages. Shape Melanosomes are bound by a lipid membrane and are, in general, rounded, sausage-like, or cigar-like in shape. The sha… (More on Melanosome)