pigmentum

The _pigmentum nigrum_ of the ox I find to lose its colour entirely, and to leave only a quantity of white flocks, when rubbed in a mortar with chlorine water.

An Investigation into the Nature of Black Phthisis or Ulceration Induced by Carbonaceous Accumulation in the Lungs of Coal Miners Archibald Makellar

Starting from the discovery of M. Flaurens as to the _pigmentum_ or coloring matter of the skin, he contends with great force that nothing but the gradual influence of climate, giving a greater and greater intensity to the action of this coloring matter, which exists in every race and every individual, has caused the essential difference between whites and blacks.

The International Monthly, Volume 2, No. 4, March, 1851 Various

Also called _King's Yellow_, _Chinese Yellow_, _Yellow Orpiment_, &c., was known in ancient times: the Romans called it _auri pigmentum_ or gold colour, whence, by corruption, its present name is derived.

Field's Chromatography or Treatise on Colours and Pigments as Used by Artists George Field

M. Flourens had this pigmentum nigrum denuded by maceration, when it appeared of a much blacker hue than it had previously presented.

Cause and contrast : an essay on the American crisis, T. W. MacMahon 1862

I wish we had less of the pigmentum nigrum in our complexion.

Franklin County: Samuel G. Lane to Edward McPherson, March 16, 1860 Samuel G. Lane 1860

African tribes, where I have been "chaffed" about a brother white, who proved to be an exceptional negro without pigmentum nigrum.

Two Trips to Gorilla Land and the Cataracts of the Congo Volume 1 Richard Francis Burton 1855

In many animals, but more particularly those which catch their prey in the night, this pigmentum is of a bright colour: its use will appear afterwards.

Popular Lectures on Zoonomia Or The Laws of Animal Life, in Health and Disease Thomas Garnett 1784

In the human eye the whole choroid coat, and even the interior surface of the iris or uvea, is lined with a black mucus; this mucus, or as it is called, pigmentum, is darkest in young persons, and becomes more light coloured as we advance in years.

Popular Lectures on Zoonomia Or The Laws of Animal Life, in Health and Disease Thomas Garnett 1784

“chaffed” about a brother white, who proved to be an exceptional negro without pigmentum nigrum.

Two Trips to Gorilla Land and the Cataracts of the Congo 2003

(*) membranae, pallidus etiam humor eft, atrumque pigmentum pracedit, Glan - dulas bronchiales ferofttm lac imbuit, in ejus locqm in adulto homine nigerri - rnus pariter ex caeruleo humor fuccedit.

Elementa physiologiae corporis humani .. 1776