The iris is a muscular, Pigmented curtain extending across the interior of the eye and having about its center an aperture termed the pupil.
"Special Report on Diseases of Cattle"
U.S. Department of Agriculture J.R. Mohler
We do not eat negroes, although their Pigmented skins, flat feet, and woolly heads proclaim them a different species; even monkey's flesh is abhorrent to us, merely because we fancy that that creature in its ugliness resembles some old men and some women and children that we know.
"Afoot in England"
W.H. Hudson
31 was made by placing in salt water a drop of the same solution Pigmented with blood or Indian ink, and placing on either side of this central drop a hypertonic drop of salt solution more lightly coloured.
"The Mechanism of Life"
Stéphane Leduc