Vĭs′u-al, a.

(vĭzh′u-al), a. [Fr. visuel, Pr. vizual, Sp. & Pg. visual, It. visuale, L. Lat. visualis, from Lat. visus, a seeing, sight, from videre, visum, to see.] Belonging or relating to sight; used in sight; serving as the instrument of seeing; as, the visual nerve.

The air. Nowhere so clear, sharpened his visual ray. Milton.

Visual angle (Opt.), the angle under which an object is seen; the angle formed at the eye by the rays of light coming from the extremities of the object. — Visual cone (Persp.), a cone whose vertex is at the point of sight. — Visual plane, any plane passing through the point of sight. — Visual point, a point in the horizontal line in which the visual rays unite. — Visual ray, a line of light supposed to come from a point of the object seen to the eye.