Cornu

(korf-nu): pi., Cornua. A horn. A name applied to any. excrescence resembling a horn. C. ammon is, the hippocampus major of the brain. C. cervi, hartshorn or ammonium hydrate. C. cutaneum, cornu humanum, a horn or excrescence arising from the skin, with a deeper portion imbedded within. These horns vary in shape and size, and may resemble the horns of lower animals. They are solid, dry, dense, smooth or corrugated, laminated or excavated on the surface, often elongated and conical at the extremity. In color they are white, gray, yellow, brown, or black. They may be single or multiple, and may involve any region of the body, though usually seen on the scalp and face. They are likely to recur on removal. C. humanum. See C. cutaneum. C. sacri, the prominence on each bone of the sacrum.