trachyte

Definitions


[ˈtrakʌɪt], (Noun)

Definitions:
- a grey fine-grained volcanic rock consisting largely of alkali feldspar


Phrases:

Origin:
early 19th century (denoting a volcanic rock with a rough or gritty surface): from Greek trakhus ‘rough’ or trakhutēs ‘roughness’




definition by Oxford Dictionaries