Meridian altitude

an arc of the meridian intercepted between the south point on the horizon and any point on the meridian. See Meridian, 3.

meridian altitude

[mə′rid·ē·ən ‚al·tə‚tüd] (astronomy) The altitude of a celestial body when it is on the celestial meridian of the observer, bearing 000° or 180° true.

meridian altitude

The altitude of a celestial body when the celestial meridian of the observer is either 000° or 180°.

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