K-T boundary

noun

Definition of K-T boundary

: 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

Keep scrolling for more

Learn More about K-T boundary

Dictionary Entries near K-T boundary

Statistics for K-T boundary

Look-up Popularity

Time Traveler for K-T boundary

The first known use of K-T boundary was in 1983

See more words from the same year

Comments on K-T boundary

What made you want to look up K-T boundary? Please tell us where you read or heard it (including the quote, if possible).

WORD OF THE DAY

nomothetic

involving abstract or general statements

Test Your Vocabulary

Liar, Liar Quiz

Someone who pretends to be sick in order to avoid work is a:

Name That Thing

Test your visual vocabulary with our 10-question challenge!

TAKE THE QUIZ

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Words at Play

Ask the Editors

Word Games