incubus

incubus definition - medical

in·cu·bus (ĭnˈkyə-bəs, ĭngˈ-)

noun pl. in·cu·bus·es or in·cu·bi (-bīˌ)
  1. An evil spirit believed to have sexual intercourse with women as they sleep.
  2. A nightmare.
  3. An oppressive or nightmarish burden.

The American Heritage® Medical Dictionary Copyright © 2009 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

Comments
Improve this definition.
Do you have more to add? Share your linguistic knowledge or observation.
/Register to save your comments.