mi·cro·cline 
(mīkrō-klīn′)
(mīkrō-klīn′)n.
A whitish gray, pink or green triclinic mineral of the potassium feldspar group that forms from relatively low-temperature magmas.
[German Mikroklin : mikro-, micro- (from the fact that its cleavage angle is not exactly equal to 90°) + Greek klīnein, to lean; see CLINE.]