Medical Dictionary

opacity

noun opac·i·ty \ō-ˈpas-ət-ē\
plural opac·i·ties

Definition of OPACITY

1
:  the quality or state of a body that makes it impervious to the rays of light; broadly :  the relative capacity of matter to obstruct by absorption or reflection the transmission of radiant energy (as X-rays, infrared radiation, or sound)
2
:  an opaque spot in a normally transparent structure (as the lens of the eye)
March 29, 2015
discomfit Hear it
To thwart or disconcert
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