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Related to twitch: Muscle twitch
1. a sudden muscular spasm, esp one caused by a nervous condition
2. a loop of cord used to control a horse by drawing it tight about its upper lip
Twitch(1) A live video gaming site from Amazon.com. Twitch allows spectators to watch the game being played in real time for fun or competition. Gaming developers can use the Twitch programming interface (API) to integrate Twitch functions into their games, and they can monetize their skill via ads, subscriptions and gaming tips.
Introduced in 2011, Twitch was a spin-off from the Justin.tv streaming platform that was acquired by Amazon in 2014. For more information, visit www.twitch.tv. See e-sports.
(2) (twitch) A category of video games that requires players to make sudden moves to hit a target or to avoid being destroyed or captured. Early video games and many current games use twitch game play; however, more sophisticated games require strategy as well as quick reflexes.