Also, after Fr., comedon; pl. -ōnes, -os, -ons. [L. comedo, -ōnem glutton, f. comedĕre to eat up, devour; a name formerly given to worms which devour the body.]
‘A small worm-like yellowish black-tipped pasty mass which can in some persons be made, by pressure, to exude from hair follicles. They are found on the cheeks, forehead, and nose. Also, the skin disorder in which these are found.
1866. trans. Hebra’s Dis. Skin (New Syd. Soc.), I. 123.
1874. Ruddock, Text-bk. Homœop. Med., 698. This collection when squeezed out of the skin, is emitted in a cylindrical form, having the appearance of a small grub or maggot (comedones), hence it is sometimes called ‘maggot-pimple’ or ‘whelk.’
1876. Duhring, Dis. Skin, 116. Comedo is a disorder of the sebaceous glands. They are spoken of in the plural as comedones or comedos.
1877. T. Fox, Atlas Skin Dis., 98. But Acne Simplex is nothing more nor less than inflamed comedo.
1885. Dis. Skin & Blood, 9. The exposed ends become black from dust and smoke … and the whole is called a ‘black-head’ or comedone.
