media1 ['mi:d??]
¦ noun
2. [treated as sing. or plural] the main means of mass communication (especially television, radio, and newspapers) regarded collectively.
Usage
The word media comes from the Latin plural of medium. The traditional view is that it should therefore be treated as a plural noun in all its senses in English. In practice, in the sense 'television, radio, and the press collectively', it behaves as a collective noun (like staff or clergy, for example), which means that it is acceptable in standard English for it to take either a singular or a plural verb.
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media2 ['mi:d??]
¦ noun (plural mediae -d?i:) Anatomy an intermediate layer, especially in the wall of a blood vessel.
Origin
C19: shortening of mod. L. tunica (or membrana) media 'middle sheath (or layer)'.