ORTHOCLASE


Meaning of ORTHOCLASE in English

[ '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.