mirage Look up mirage at Dictionary.com
"optical illusion of water in sandy deserts," 1812, from Fr. mirage, from se mirer "to be reflected," from L. mirare (see mirror).
Fata Morgana Look up Fata Morgana at Dictionary.com
1818, lit. "Fairy Morgana," mirage especially common in the Strait of Messina, Italy, from Morgana, the "Morgan le Fay" of Anglo-Fr. poetry, sister of King Arthur, located in Calabria by Norman settlers. Morgan is Welsh, "sea-dweller." There is perhaps, too, here an infl. of Arabic marjan, lit. "pearl," also a fem. proper name, popularly the name of a sorceress.