Gain access to thousands of additional definitions and advanced search features—ad free! JOIN NOW
: the aspect of visual acuity that involves the ability to detect the alignment or lack of alignment of the two parts of a broken line (as in reading a vernier scale) — compare grating acuity, hyperacuity, stereoacuity
Share vernier acuity
Resources for vernier acuity
Comments on vernier acuity
What made you want to look up vernier acuity? Please tell us where you read or heard it (including the quote, if possible).
full of whispering sounds
Get Word of the Day daily email!
Difficult Vocab Quiz
Can you spell these 10 commonly misspelled words?
Test Your Knowledge - and learn some interesting things along the way.
Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!
Words from the week of 11/16/2018
This is just to say / Don't confuse them
What exactly is the 'it' being sufficed?
Taking a usage peeve to task
And is one way more correct than the others?
The story of an imaginary word that managed to sneak past our editors and enter the dictionary.
How to use a word that (literally) drives some people nuts.
The awkward case of 'his or her'
Another round of challenging vocab!
(Secret October WOTD Quiz)
SCRABBLE® fans, sharpen your skills!