slider, n.
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One who, or that which, slides; especially, a sliding part of an instrument or machine. [1913 Webster]
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The red-bellied terrapin (Pseudemys rugosa). [1913 Webster]
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any of several North American freshwater turtles of the genus Chrysemis; some, such as C. scripta are sold commercially as pets. [PJC]
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a fast pitch that breaks slightly just in front of the batter, in the same direction as a curve ball (i. e. , away from the side from which it was thrown). [PJC]
Slider pump, a form of rotary pump.