Main Entry: ro·ta·tion

Pronunciation: \rō-ˈtā-shən\

Function: noun

: the action or process of rotating on or as if on an axis or center ; specifically : the turning of a body part about its long axis as if on a pivot <rotation of the head to look over the shoulder>

—ro·ta·tion·al \-shnəl, -shən-^əl\ adjective