A device or structure, such as a drawbridge, counterbalanced so that when one end is lowered the other is raised.
[French, seesaw : bas, low (from Old French, from Medieval Latin bassus) + cul, bottom (from Old French, from Latin cūlus, rump; see (s)keu- in the Appendix of Indo-European roots).]
(click for a larger image)bascule
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Indo-European & Semitic Roots Appendices
Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:
The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.