Etymology
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media (n.)

"newspapers, radio, TV, etc." 1927, perhaps abstracted from mass-media (1923, a technical term in advertising); plural of medium (n.) as "intermediate agency," a sense attested in English from c. 1600. Also see -a (2).

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multi- 

before vowels mult-, word-forming element meaning "many, many times, much," from combining form of Latin multus "much, many," from PIE *ml-to-, from root *mel- (2) "strong, great, numerous." It was much-used in forming Latin compounds in classical times and after (such as multianimis "having much courage," multibibus "much-drinking," multicomus "having much hair," multiloquus "talkative"). Many English words that use it (multinational, etc.) are 20c. coinages.

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multi-use (adj.)

1941, "designed for different functions," from multi- "many" + use (n.). By 1945 as "designed to be used more than once," from multi- in the sense of "many times."

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multi-ply (adj.)

"having several layers or webs," 1887, from multi- "many" + ply (n.) "a layer, a fold."

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mass-media (n.)

singular mass-medium, "means of communication that reach large numbers of people," 1923; see mass (n.1) + media (n.).

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multi-millionaire (n.)

also multimillionaire, "one worth many millions" (of dollars, pounds, etc.), 1858, from multi- "many times" + millionaire.

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multimedia (adj.)

also multi-media, "using more than one medium" (in the arts, education, or communication), by 1959, from multi- "many" + media.

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multilineal (adj.)

also multi-lineal, "having many lines," 1800, from multi- + lineal. Multi-linear is by 1815.

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multistory (adj.)

also multi-story, multi-storey, "of many stories or floors," 1907, from multi- "many" + story (n.2).

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multicolored (adj.)

also multi-colored, multi-coloured, "having many or various colors," 1819, from multi- "many" + colored. Late Latin had multicolorus "many-colored."

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