twenty-twenty

[twen-tee-twen-tee, twuhn-tee-twuhn-tee]

twen·ty-twen·ty

[twen-tee-twen-tee, twuhn-tee-twuhn-tee]
adjective
1.
Ophthalmology. having normal visual acuity.
2.
keenly or acutely perceptive: an opinion based on twenty-twenty hindsight.
Also, 20-20.


Origin:
1935–40
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Twenty-twenty is always a great word to know.
So is zedonk. Does it mean:
a gadget; dingus; thingumbob.
the offspring of a zebra and a donkey.
Collins
World English Dictionary
twenty-twenty
 
adj
med (of vision) being of normal acuity: usually written 20/20

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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American Heritage
Science Dictionary
twenty-twenty or 20/20   (twěn'tē-twěn'tē)  Pronunciation Key 
Having normal visual acuity. A person with twenty-twenty vision can see type as small as one-third of an inch at a distance of twenty feet.
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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