A volcano, 4,100 m (13,448 ft) high, of west-central Mexico. Mexico's most active volcano, it erupted explosively in 1987 and 1994.
The American Heritage® Dictionary of the English Language, Fourth Edition Copyright © 2007, 2000 by Houghton Mifflin Company. Updated in 2007. Published by Houghton Mifflin Company. All rights reserved.
