major axis n. (Geom.), The greater axis of a geometrical figure. Especially: The longest axis of an ellipse or ellipsoid, which passes through the two foci. See Focus, n., 2.
... nearer. As it gets nearer its orbital velocity will be proportionately increased, with the result that the eccentricity of the earth's orbit will increase also. From a consideration of the movement of the major axis of the earth's orbit, which is moving forward at the rate of 11 deg. per year, we are told that a whole revolution will be made ... — Aether and Gravitation • William George Hooper
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