major axis

major axis

n.

The longer of the two lines about which an ellipse is symmetrical; the axis that passes through both focuses of an ellipse.

Thesaurus

Noun

1.

major axis - the longest axis of an ellipse or ellipsoid; passes through the two foci axis - a straight line through a body or figure that satisfies certain conditions semimajor axis - one-half the major axis of an ellipse; the distance from the center of an ellipse to one end