K-T boundary
زبان مبدأ: انگلیسی
ترجمه به فارسی
- واژهنامه · Merriam-Webster Collegiate Dictionary K-T boundary Function: noun Etymology: K (alternative for C as abbreviation for Cretaceous ) + T ertiary Date: 1983 : the transition between the Cretaceous and Tertiary periods of geologic time characterized by a mass extinction of many forms of life including the dinosaurs also : a geologic stratum marking this boundary