[ 'ɔ:θəkleɪz ]
■ noun a potassium-rich mineral of the feldspar group, typically white or pink.
Origin
C19: from ortho- + Gk klasis 'breaking' (because of the characteristic two cleavages at right angles).
[ 'ɔ:θəkleɪz ]
■ noun a potassium-rich mineral of the feldspar group, typically white or pink.
Origin
C19: from ortho- + Gk klasis 'breaking' (because of the characteristic two cleavages at right angles).
Concise Oxford English vocab. Сжатый оксфордский словарь английского языка. 2004