orthopyroxene
or tho py rox ene |ˌôrTHōpīˈräksēn ˌɔrθoʊˌpaɪˈrɑkˌsin | ▶noun a mineral of the pyroxene group crystallizing in the orthorhombic system.
orthopyroxene |ˌɔːθə (ʊ )pʌɪˈrɒksiːn | ▶noun [ mass noun ] a mineral of the pyroxene group crystallizing in the orthorhombic system.
The Wordsmith Dictionary
The Wordsmith Dictionary