n. Same as snake's-head, 1.n. A plant, the turtle-head, Chelone glabra, used in medicine as a tonic and aperient. See Chelone.n. A fish of the family Ophiocephalidæ.n. A snake-headed turtle, Chelys matamata, having a large flat carapace and long pointed head, found in South America. See cut under Chelydidæ.n. The end of a flat railroad-rail when curling upward.