almucantar

(redirected from almucantars)
Also found in: Encyclopedia.
Related to almucantars: Almucantar staff

almucantar

(ˌælməˈkæntə) or

almacantar

n
1. (Astronomy) a circle on the celestial sphere parallel to the horizontal plane
2. an instrument for measuring altitudes
[C14: from French, from Arabic almukantarāt sundial]

almucantar

A circle on the celestial sphere that is parallel to the horizontal plane.
References in periodicals archive ?
She points out, for example, that "the projection of the semicircular ribs of the Trinity barrel vault is directly analogous to the astrolabist's method of projecting almucantars (circles of celestial latitude) ranging above the observed horizon" (99).