An Etymological Dictionary of Astronomy and Astrophysics
English-French-Persian

1) The height above sea level.
2) The angle between an object's position on the celestial sphere and the horizon.
3) Of a triangle, the perpendicular from the base to the opposite vertex.

Altitude, from L. altitudo, from altus "high".

Farâzâ, from farâz "above, up, upon," → height, + noun making suffix -a.

A circle on the celestial sphere that has equal altitude over the Earth's surface and lies parallel to the horizon. Also called almucantar, circle of altitude, parallel of altitude.

→ altitude; → circle.

Same as → altazimuth mounting.

→ altitude; → azimuth; → mounting.

A small circle on the celestial sphere parallel to the horizon. The locus of all points of a given altitude. Also called → almucantar, → altitude circle, → parallel of altitude.

→ circle; → altitude.

A small circle on the celestial sphere whose plane is parallel to the celestial horizon. Same as → almucantar.

→ parallel; → altitude.

→ almucantar.