Medical Dictionary
2 ENTRIES FOUND:

booster

noun boost·er \ˈbü-stər\

Medical Definition of BOOSTER

:  a substance that increases the effectiveness of a medicament; especially :  booster shot
April 18, 2015
wimple Hear it
to veil, ripple, or meander
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