From Mons Mensae (mensa (“table”)), from Montagne de la Table. Originally named Montagne de la Table after Table Mountain in South Africa in 1756 by the French astronomer Nicolas Louis de Lacaille. By 1763 this had been Latinised as Mons Mensae. In 1922 the International Astronomical Union shortened this to Mensa.
- (astronomy) A summer constellation of the southern sky, originally named after Table Mountain in South Africa. It lies between the constellations of Hydrus and Volans.