20 20
[twen-tee-twen-tee, twuhn-tee-twuhn-tee] /ˈtwɛn tiˈtwɛn ti, ˈtwʌn tiˈtwʌn ti/
adjective
ophthalmology. having normal visual acuity.
keenly or acutely perceptive:
an opinion based on twenty-twenty hindsight.
also, 20-20.
twenty-twenty
adjective
(med) (of vision) being of normal acuity: usually written 20/20
twenty-twenty or 20/20
(twěn’tē-twěn’tē)
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.
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[twen-tee-wuhn, twuhn-] /ˈtwɛn tiˈwʌn, ˈtwʌn-/ noun a cardinal number, 20 plus 1. a symbol for this number, as 21 or xxi. a set of this many persons or things. also, 21. also called blackjack. a gambling game at cards, in which the object is to obtain from the dealer cards whose values add up to, […]