Origin of duopoly
(countable and uncountable, plural duopolies)
By analogy with monopoly based on Ancient Greek δύο (duo, “two”) + πωλειν (pōlein, “to sell”).
A condition in which two entities dominate a market. Pronounced "doo-op-a-lee." For example, Windows and Mac are a personal computer duopoly. iOS and Android are a smartphone duopoly.
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