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hairball

[hair-bawl]
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noun
  1. a ball of hair accumulated in the stomach or intestines of a cat or other animal as a result of the animal's licking its coat.
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Origin of hairball

First recorded in 1705–15; hair + ball1
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for hairball

hairball

noun
  1. a compact mass of hair that forms in the stomach of cats, calves, etc, as a result of licking and swallowing the fur, and causes vomiting, coughing, bloat, weight loss, and depression
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for hairball

n.

1712, from hair + ball (n.1).

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Online Etymology Dictionary, © 2010 Douglas Harper

hairball in Medicine

hairball

(hârbôl′)
n.
  1. A small mass of hair located in the stomach or intestine of an animal, such as a cat, resulting from an accumulation of small amounts of hair that are swallowed each time the animal licks its coat.pilobezoar trichobezoar
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.