The Collaborative International Dictionary
Slider pump
Slider \Slid"er\, n.
One who, or that which, slides; especially, a sliding part of an instrument or machine.
(Zo["o]l.) The red-bellied terrapin ( Pseudemys rugosa).
(Zo["o]l.) any of several North American freshwater turtles of the genus Chrysemis; some, such as C. scripta are sold commercially as pets.
--[RHUD]-
(Baseball) 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).
Slider pump, a form of rotary pump.
Wiktionary
slider pump
n. A form of rotary pump.