Medical Dictionary

fastness

noun fast·ness \ˈfas(t)-nəs\

Medical Definition of FASTNESS

:  resistance (as of an organism) to the action of a usually toxic substance <streptomycin fastness developed by a strain of tubercule bacillus>

Browse

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