(pernio), in Medicine, a tumour affecting the feet and hands, accompanied with an inflammation, pains, and sometimes an ulcer, in which case it takes the denomination of chaps on the hands, and of kibes on the heels. Chilblain is compounded of chill and blain; that is, a blain or sore contracted by cold. Pernio is the Latin name adopted by physicians, and is derived by Vossius from pernia, a gammon of bacon, on account of some fancied resemblance. Chap alludes to gap, both in sound and appearance. Kibes, in Welch kibes, may be derived from the German kerben, to cut; the skin when broken appearing like a cut.