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bel·lows (bĕlōz, -əz)
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pl.n. (used with a sing. or pl. verb)
1.
a. An apparatus for producing a strong current of air, as for sounding a pipe organ or increasing the draft to a fire, consisting of a flexible, valved air chamber that is contracted and expanded by pumping to force the air through a nozzle.
b. Something, such as the pleated windbag of an accordion, that resembles this apparatus.
2. The lungs.

[Middle English belowes, from Old English belgas, pl. of belg; see bhelgh- in the Appendix of Indo-European roots.]
(click for a larger image)
bellows
three-row diatonic accordion

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. All rights reserved.
 
Bel·lows (bĕlōz), George Wesley 1882-1925.
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American artist of the Ashcan school, noted for his energetic paintings of sporting scenes, such as Stag at Sharkey's (1907).

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2022 by HarperCollins Publishers. 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.