Medical Definition of Snellen chart. : the chart used in the snellen test with black letters of various sizes against a white background.
The circumcenter, the incenter is the point of concurrency of the angle bisectors of a triangle.
Circumcenter. The circumcenter is the point of intersection of the three perpendicular bisectors. A perpendicular bisectors of a triangle is each line drawn perpendicularly from its midpoint. The circumcenter is the center of the circle inscribed in the triangle.