K-T boundary
 n.— «This clay marked what scientists call the K-T boundary, the junction between rocks in which the fossils of dinosaurs are found, and those above, in which dinosaur bones have been replaced by more modern creatures.» —“Experts clash over demise of the dinosaur” by Roger Highfield Telegraph (U.K.) Feb. 2, 2006. (source: Double-Tongued Dictionary)

Tagged with →