the inedible nutlike seed of the horse chestnut
"The gardener carefully removed the toxic buckeyes from his tree before they could accidentally fall onto the children's playground."
tree having palmate leaves and large clusters of white to red flowers followed by brown shiny inedible seeds
"As we hiked through the forest, the towering buckeye trees stood out with their distinctive palmate leaves and heavy clusters of creamy-white blossoms."
Any of several species of trees of the genus Aesculus.
"When I moved to Columbus, my new neighbors immediately introduced themselves as fellow buckeyes since they had lived in Ohio their whole lives."
A native or resident of the American states of Ohio and Arizona.