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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


(1) A live video gaming site from 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 streaming platform that was acquired by Amazon in 2014. For more information, visit 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.
References in periodicals archive ?
Peak plantar flexor torque (PT) and rate of torque development (RTD) during maximum voluntary contractions and potentiated twitches following 30 s (V30) and 300 s (V300) of local vibration.
This configuration allows line to pass freely through the sinker, transmitting rod-tip twitches and bites directly.
As discussed in Editor's Notebook in this issue, Walleye In-Sider Editor Dan Johnson generally skull-hooks a minnow on the rear-facing treble tine, then pendulums the presentation with side-to-side rod tip twitches.
Like a terrified bird in constant motion, always on the verge of imbalance, she jerks her head, twitches her fingers as she wavers, wobbles, totters on her toes.
The Knee Jerk reads a letter to the editor or hears a customer complaint and immediately twitches. He then races down halls waving papers and demanding an immediate communication program to make those people understand!
You''ve noticed twitches in your quads (the big muscle on the front of you thigh) which can be quite painful.
However, the evoked twitches produced by a cortical stimulus superimposed during maximal isometric contractions test degree of volitional drive to muscle for supraspinal contributions, while the evoked twitch force to peripheral stimulation assesses spinal neural drive (Lee et al., 2008).
EYELID twitches are normally caused by fatigue or lack of sleep.