Medical Dictionary
2 ENTRIES FOUND:

deadly

adj dead·ly \ˈded-lē\
dead·li·erdead·li·est

Medical Definition of DEADLY

:  likely to cause or capable of causing death <a deadly disease> <a deadly poison> <a deadly instrument>
dead·li·ness \-nəs\ noun
May 05, 2015
epigram Hear it
a short and clever poem or saying
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