Definition of self-stimulatory
: of, relating to, or involving the stimulation of oneself
Self-stimulatory behavior, often initiated to alleviate extreme anxiety, may serve as a coping mechanism to counteract an overwhelming sensory environment. This may be observed as various repetitive actions (stimming) and may include hand-flapping, rocking, body spinning, obsessive handling of an object, and echolalia …— Jacqueline C. Dailey This boy engaged in a high rate of self-stimulatory activity, and on occasion would scream loudly when a peer interrupted his repetitive behavior.— Nancy Stephens and Elaina Sauber Many get satisfaction from self-stimulatory, masturbatory techniques rather than via one's partner.— Kersi Chavda
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Merriam-Webster unabridged
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Time Traveler for self-stimulatory
The first known use of self-stimulatory was in 1965
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