[pʌɪˈrɒksiːn], (Noun)

Definitions:
- any of a large class of rock-forming silicate minerals, generally containing calcium, magnesium, and iron and typically occurring as prismatic crystals


Phrases:

Origin:
early 19th century: from pyro- ‘fire’ + Greek xenos ‘stranger’ (because the mineral group was supposed alien to igneous rocks)