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.
A line or ray that divides an angle in half. For polygons, an angle bisector is a line that bisects an interior angle. Note: The angle bisectors of a triangle are concurrent and intersect at the incenter.