cosh

1
[kosh]Chiefly British Slang.
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verb (used with object)
  1. to hit on the head with a cosh.

Origin of cosh

1
1865–70; perhaps < Romany kosh, koshter stick

cosh

2
[kosh]
noun Mathematics.
  1. hyperbolic cosine.

Origin of cosh

2
First recorded in 1870–75; cos(ine) + h(yperbolic)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018


Examples from the Web for cosh

Historical Examples of cosh


British Dictionary definitions for cosh

cosh

1
noun
  1. a blunt weapon, often made of hard rubber; bludgeon
  2. an attack with such a weapon
verb (tr)
  1. to hit with such a weapon, esp on the head

Word Origin for cosh

C19: from Romany kosh, from koshter skewer, stick

cosh

2
noun
  1. hyperbolic cosine; a hyperbolic function, cosh z = 1/2 (e z + e –z), related to cosine by the expression cosh i z = cos z, where i = √–1

Word Origin for cosh

C19: from cos (ine) + h (yperbolic)
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 cosh
n.

"stout stick," 1869, of unknown origin.

Online Etymology Dictionary, © 2010 Douglas Harper

cosh in Science

cosh

  1. Abbreviation of hyperbolic cosine
The American Heritage® Science Dictionary Copyright © 2011. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.