Dalradian

 
Pronunciation: /dalˈrɑːdɪən/

adjective

Geology
  • relating to or denoting a series of late Precambrian metamorphic rocks, occurring in Scotland and Ireland.
  • (as noun the Dalradian) the Dalradian series of rocks.

Origin:

late 19th century: from Dalrad-, from Dalriada (by alteration), + -ian