In mining law. A body of mineral or mineralized rock, filling a seam or fissure in the earth’s crust, within defined boundaries in the general mass of the mountain, and having a general character of continuity in the direction of its length. See Iron Silver Min. Co. v. Cheesman, 116 U. S. 529, 6 Sup. Ct 481, 29 L. Ed. 712; U. S. v. Iron Silver Min. Co., 128 U. S. 673, 9 Sup. Ct. 195, 32 L. Ed. 571; Stinchfleld v. Gillls, 96 Cal.