moqantar, parhun-e farâzâ
A small circle on the celestial sphere parallel to the horizon. The locus of all points of a given altitude. Also called altitude circle, circle of altitude, parallel of altitude.
Almucantar, from L. almucantarath, from Ar. almuqantarât, from al- "the" + muqantarât "sundial," from qantarah "arch".