Definitions for

**"MINOR AXIS"**The short diameter of an ellipse.

The shortest diameter of an ellipse; the line from one side of an ellipse to the other that passes midway between the foci and is perpendicular to the major axis. Also, the length of that line.

The shortest diameter of the ellipse that passes through the center. Alternatively, the line segment perpendicular to the major axis and through the center with endpoints on the ellipse.