mass psychogenic illness
nounThe American Heritage® Dictionary of the English Language, 4th edition Copyright © 2010 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
The occurrence of psychogenic illness in a group of people at the same time. Examples include the biting manias and dancing manias that spread throughout parts of Europe between the 13th and 17th century.