Medical Dictionary

messenger

noun mes·sen·ger \ˈmes-ən-jər\

Medical Definition of MESSENGER

1
:  a substance (as a hormone) that mediates a biological effect—see first messenger, second messenger
July 04, 2015
stringent Hear it
rigorous, strict, or severe
Take a 3-minute break and test your skills!
How to use a word that (literally) drives some people nuts.
Test your vocab with our fun, fast game
Ailurophobia, and 9 other unusual fears