donker
n.— «The brown shiny seeds, called buckeyes, are considered to be lucky charms. Avid Gardener member Ann Clayton, who is from Manchester, England, tells me that buckeyes are called “donkers” there. Fastened to a string, they were used in a game not unlike yo-yo. Clayton and other Avid Gardeners plan to propagate buckeyes by planting the seed.» —“Club’s next project: Plant Whooping Crane Island” by Betsy Jukofsky Island Packet (Hilton Head/Bluffton, South Carolina) Feb. 26, 2007. (source: Double-Tongued Dictionary)