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thumbtack

 - 3 dictionary results

thumb⋅tack

[thuhm-tak]
–noun
1. a tack with a large, flat head, designed to be thrust into a board or other fairly soft object or surface by the pressure of the thumb.
–verb (used with object)
2. to attach or tack by means of a thumbtack.

Origin:
1880–85, Americanism; thumb + tack 1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2009.
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thumb·tack   (thŭm'tāk')   
n.  A tack with a smooth, rounded head that can be pressed into place with the thumb.
tr.v.   thumb·tacked, thumb·tack·ing, thumb·tacks
To affix with a thumbtack.
The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2009 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
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Word Origin & History

thumbtack 
tack with a broad, flat head which may be driven by pressure from the thumb, 1884, from thumb + tack.
Online Etymology Dictionary, © 2001 Douglas Harper
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