poison

poison definition - medical

poi·son (poiˈzən)

noun
  1. A substance taken internally or applied externally that is injurious to health or dangerous to life.
  2. A chemical substance that inhibits another substance or a reaction.
verb
To kill or harm with poison.

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.