COCHINEAL, n. An insect, the Coccus cacti, of the genus Coccus, a native of the warmer climates of America, particularly of Oaxaca, in Mexico. It is found on a plant called nopal or Indian fig-tree. The female, which alone is valued for its color, is ill-shaped, tardy and stupid; the male is small, slender and active. It is of the size of a tick. At a suitable time, these insects are gathered and put in a pot, where they are confined for some time, and then killed by the application of heat. These insects thus killed form a mass or drug, which is the proper cochineal of the shops. It is used in giving red colors, especially crimson and scarlet, and for making carmine. It has been used in medicine, as a cardiac, sudorific, alexipharmic and febrifuge; but is now used only to give a color to tinctures, &c.
