pike

(geology) A mountain or hill which has a peaked summit.
(vertebrate zoology) Any of about five species of predatory fish which compose the family Esocidae in the order Clupeiformes; the body is cylindrical and compressed, with cycloid scales that have deeply scalloped edges.

Any of about five species of fish which compose the family Esocidae in the order Clupeiformes, known by a variety of names such as pickerel and muskellunge. These fish are voracious predators with an elongated beaklike snout and sharp teeth. The head is partly scaled and the body is covered with cycloid scales that have deeply scalloped edges. The body is cylindrical and compressed; thus, these fish are well adapted for rapid movements as they dart after prey. They prey upon each other, as well as other fish, amphibians, small aquatic birds and mammals, and rats. All species are edible but are considered second-rate game fish. See also Clupeiformes.