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Comprehensive
Dictionary Suite
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cam in machinery, a noncircular disc or cylinder that, when rotated, imparts an up-and-down or start-and-stop motion to a connected part.
jiggle a jerky up-and-down or back-and-forth movement. [1/2 definitions]
pump1 to move with a rapid, repetitive back-and-forth or up-and-down motion. [2/12 definitions]
rapid eye movement the rapid back-and-forth and up-and-down movements of the eyes during the phases of sleep when dreaming occurs. (abbrev.:REM)
seesaw any up-and-down or back-and-forth motion. [1/4 definitions]
turkey trot a dance to ragtime music, popular in the early 1900s, characterized by a springy walk and up-and-down movements of the shoulders.