A circle on the celestial sphere that passes through all points having the same altitude above the horizon, used in astronomy and navigation.
From Arabic 'al-muqantarat' (the circling), derived from 'qantar' meaning to arch or circle. The term entered European astronomy through medieval Islamic scientific texts and was adopted by navigators and astronomers during the Age of Exploration.
Almacantars were absolutely crucial for medieval and Renaissance sailors—they allowed navigators to determine their latitude using star positions, making long ocean voyages possible without modern GPS!
Complete word intelligence in one call. Free tier — 50 lookups/day.