1845 J. C. Prichard (ed. 2) 89 Description of the pigment-cells in the negro.
1953 H. Mellanby (ed. 5) vi. 57 The skin contains star-shaped pigment cells (chromatophores), the contraction or expansion of which enable the animal to lighten or darken the general body colour.
1992 Winter 84 We had learned in science about pigment cells and why some people don't tan.