a little circle for the world parallel into the horizon a circle or parallel of altitude Two performers that have equivalent almucantar have a similar altitude See Almacantar
- a tiny circle of the world parallel into horizon; a group or parallel of height. Two stars which have the same almucantar have a similar altitude. See Almacantar.
The almucantar was therefore used only to observe the vertical transits of stars in different azimuths over fixed horizontal webs, without touching the telescope.