Etymology
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keno (n.)

game of chance (akin to bingo), 1814, American English, probably from French quine "five winning numbers in a lottery," from Latin quini "five each," distributive of quinque "five" (from PIE root *penkwe- "five"). The numbers are arranged in rows of five.

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Definitions of keno

keno (n.)
a game in which numbered balls are drawn at random and players cover the corresponding numbers on their cards;
Synonyms: lotto / bingo / beano
From wordnet.princeton.edu