Medical Dictionary


noun fil·ter \ˈfil-tər\

Medical Definition of FILTER

:  a porous article or mass (as of paper or sand) through which a gas or liquid is passed to separate out matter in suspension
:  an apparatus containing a filter medium
a :  a device or material for suppressing or minimizing waves or oscillations of certain frequencies (as of electricity, light, or sound) b :  a transparent material (as colored glass) that absorbs light of certain wavelengths or colors selectively and is used for modifying light that reaches a sensitized photographic material—called also color filter
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