: the Iranian language of ancient Media
1
: a medial (see medial sense 2b) part (such as a vein or nerve)
2
a
: a value in an ordered set of values below and above which there is an equal number of values or which is the arithmetic mean of the two middle values if there is no one middle number
b
: a vertical line that divides the histogram of a frequency distribution into two parts of equal area
c
: a value of a random variable for which all greater values make the cumulative distribution function greater than one half and all lesser values make it less than one half
3
a
: a line from a vertex (see vertex sense 2) of a triangle to the midpoint of the opposite side
b
: a line joining the midpoints of the nonparallel sides of a trapezoid (see trapezoid sense 1a)
4
1
: being in the middle or in an intermediate position : medial
2
: lying in the plane dividing a bilateral animal into right and left halves
3
: relating to or constituting a statistical median
4
: produced without occlusion along the lengthwise middle line of the tongue
medianly
adverb
plural medias
often attributive
1
a
singular or plural in construction
: mass media
b
medias plural
: members of the mass media (such as news outlets)
2
: a medium of cultivation, conveyance, or expression
Air is a media that conveys sound.
especially
: medium sense 2a
The singular media and its plural medias seem to have originated in the field of advertising over 70 years ago; they are still so used without stigma in that specialized field. In most other applications media is used as a plural of medium. The popularity of the word in references to the agencies of mass communication is leading to the formation of a mass noun, construed as a singular.
there's no basis for it. You know, the news media gets on to something
—
Edwin Meese 3d
the media is less interested in the party's policies
—
James Lewis, Guardian Weekly
This use is not as well established as the mass-noun use of data and is likely to incur criticism especially in writing.
plural mediae
ˈmē-dē-ˌē
1
[Late Latin, from Latin, feminine of medius; from the voiced stops' being regarded as intermediate between the tenues and the aspirates]
: a voiced (see voiced sense 2) stop (see stop entry 2 sense 1b)
2
[New Latin, from Latin]
: the middle coat of the wall of a blood or lymph (see lymph sense 2) vessel consisting chiefly of circular muscle fibers
media
6 of 6plural of medium
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Merriam-Webster unabridged



