abrupt
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abrupt
1. Botany shaped as though a part has been cut off; truncate
2. Geology (of strata) cropping out suddenly
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
abrupt
[ə′brəpt] (botany)
Ending suddenly, as though broken off.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.