volcanic glass
noun
Definition of volcanic glass
: natural glass produced by the cooling of molten lava too rapidly to permit crystallization
People Are Reading
First Known Use of volcanic glass
circa 1840
Learn More about volcanic glass
-
See words that rhyme with volcanic glass Britannica.com: Encyclopedia article about volcanic glass
Seen and Heard
What made you want to look up volcanic glass? Please tell us where you read or heard it (including the quote, if possible).
Writing? Check your grammar now!