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bi·cy·cle (bīsĭkəl, -sĭ-kəl, -sīkəl)
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n.
1. A vehicle consisting of a light frame mounted on two typically wire-spoked wheels one behind the other and usually having a seat, handlebars for steering, brakes, and two pedals by which it is driven.
2. An exercise bicycle.
intr.v. bi·cy·cled, bi·cy·cling, bi·cy·cles
To ride or travel on a bicycle.

[Probably BI-1 + -cycle (on the model of TRICYCLE, three-wheeled coach).]

bicy·cler (-klər), bicy·clist (-klĭst) n.

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:

    Indo-European Roots

    Semitic Roots

    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.

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