[ 'fɛldspα: ]
(also felspar )
■ noun an abundant rock-forming aluminosilicate mineral, typically colourless or pale-coloured.
Derivatives
feldspathic adjective
Origin
C18: alt. of Ger. Feldspat , Feldspath , from Feld 'field' + Spat , Spath 'spar' (see spar 3 ); the form felspar is by mistaken assoc. with Ger. Fels 'rock'.