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underspin
un·der·spin U0059100 (ŭn′dər-spĭn′)n. A backspin.underspin (ˈʌndəˌspɪn) n (Ball Games, other than specified) ball games a backspinunderspin
underspin[′ən·dər‚spin] (mechanics) Property of a projectile having insufficient rate of spin to give proper stabilization. |