Plinian
Concise Oxford English Dictionary © 2008 Oxford University Press:
Plinian /ˈplɪnɪən/
▶adjective Geology relating to or denoting a type of volcanic eruption in which a narrow stream of gas and ash is violently ejected from a vent to a height of several miles.
– origin C17: from Ital. pliniano, with ref. to the eruption of Vesuvius in ad 79, in which Pliny the Elder died.
'Plinian' also found in these Oxford entries:
