hyperacuity

noun hy·per·acu·i·ty \ ˌhī-pər-ə-ˈkyü-ə-tē , -a- \
variants: or hyper-acuity

Definition of hyperacuity

: greater than normal acuteness of a sense
  • Her anarchy is perfectly balanced with her hyperacuity about tone and timbre and atmosphere and drift.
  • —Charles Baxter
especially : visual acuity that is better than twenty-twenty

First Known Use of hyperacuity

1887

in the meaning defined above

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Medical Dictionary

hyperacuity

noun hy·per·acu·ity \ ˌhī-pə-rə-ˈkyü-ət-ē \

medical Definition of hyperacuity

plural hyperacuities
: greater than normal acuteness especially of a sense; specifically : visual acuity that is better than twenty-twenty — compare grating acuity, stereoacuity, vernier acuity

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