buckeye

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. Any of various North American trees or shrubs of the genus Aesculus, having palmately compound, opposite leaves, erect panicles of white to red or yellow flowers, and large shiny seeds with a large attachment scar. All parts of the plant are poisonous.
2. n. The spiny or smooth fruit of any of these plants.
3. n. The large shiny brown seed of such a fruit.

Century Dictionary and Cyclopedia

1. n. An American name for the different species of horse-chestnut, Æsculus, native to the United States. The species commonly distinguished are the sweet buckeye (Æ. flava), the Ohio or fetid buckeye (Æ. glabra), and the California buckeye (Æ. Californica). The wood is white, soft, and spongy, and furnishes splints for baskets, etc.
2. n. An inhabitant of Ohio, which is often called the Buckeye State, from the great number of horse-chestnuts in it.
3. n. A flat-bottomed centerboard schooner of small size (3 to 15 tons), decked over, and with a cabin aft, used in oyster-fishing in Chesapeake Bay. Also called bugeye.
4. n. In entomology, an American nymphalid butterfly, Junonia cœnia. It occurs throughout the southeastern United States, and feeds in the larval state upon plantain, snapdragon, and the figworts. It derives its popular name from the eye-spots on the wings.

Wiktionary

1. n. Any of several species of trees, of the genus Aesculus, or the related Mexican Buckeye (genus Ungnadia).
2. n. The seed or fruit of these plants
3. n. A native or resident of the American State of Ohio.

GNU Webster's 1913

1. n. (Bot.) A name given to several American trees and shrubs of the same genus (Æsculus) as the horse chestnut.
2. n. U.S. A cant name for a native or resident of Ohio.

WordNet 3.0

1. n. tree having palmate leaves and large clusters of white to red flowers followed by brown shiny inedible seeds
2. n. the inedible nutlike seed of the horse chestnut
3. n. a native or resident of Ohio