Perspicacity

Noun

 * 1) Acute discernment or understanding; insight.
 * 2) The human faculty or power to mentally grasp or understand clearly.
 * 3)  Keen eyesight.

Related terms

 * perspicaciousness
 * perspicuity

Thesaurus
acuity, acumen, acuteness, apperception, astuteness, clear sight, cogency, color vision, cone vision, critical discernment, day vision, daylight vision, discernment, discrimination, eye, eye-mindedness, eyesight, farseeingness, farsight, farsightedness, field of view, field of vision, flair, foresight, foresightedness, horizon, incisiveness, insight, judgment, keen sight, keenness, ken, longheadedness, longsightedness, night vision, penetration, perception, perceptiveness, percipience, peripheral field, peripheral vision, perspicaciousness, perspicuity, perspicuousness, photopia, power of sight, providence, purview, quick sight, range, rod vision, sagaciousness, sagacity, scope, scotopia, seeing, sense of sight, sensibility, shrewdness, sight, sightedness, sweep, trenchancy, twilight vision, unobstructed vision, vision, visual acuity, visual field, visual sense, wit

Pronunciation
Syllables: per·spi·cac·i·ty