Medical Dictionary

rarefy

verb rar·e·fy
rar·e·fied also rar·i·fiedrar·e·fy·ing also rar·i·fy·ing

Medical Definition of RAREFY

transitive verb
:  to make rare, thin, porous, or less dense :  to expand without the addition of matter
intransitive verb
:  to become less dense

Variants of RAREFY

rar·e·fy also rar·i·fy \ˈrar-ə-ˌfī, ˈrer-\

Browse

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