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acuities

[uh-kyoo-i-tee]

a·cu·i·ty

[uh-kyoo-i-tee]
noun
sharpness; acuteness; keenness: acuity of vision; acuity of mind.

Origin:
1375–1425; late Middle English acuite < Old French < Medieval Latin, Late Latin acuitās, equivalent to Latin acu(ere) to sharpen or acū(tus) sharpened (see acute) + -itās -ity

hy·per·a·cu·i·ty, noun
non·a·cu·i·ty, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Acuities is always a great word to know.
So is ninnyhammer. Does it mean:
a fool or simpleton; ninny.
a screen or mat covered with a dark material for shielding a camera lens from excess light or glare.
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