English

hyperacuity

From hyper- + acuity.

Proto-Indo-European *úp

Proto-Indo-European *upér ‘over, above’

Proto-Hellenic *hupér

Ancient Greek ὑπέρ ‘over’

Proto-Indo-European *h₂eḱ- ‘sharp’

Latin acuō ‘sharpen’

Medieval Latin acuitas

Middle French acuité

Middle English acuite

Today it means

noun sensory performance finer than the receptor grain

Language periods are conventional ranges, not dates for this word.

Etymograph / hyperacuity