per-rotatory
/ˌpəːrə(ʊ)ˈteɪt(ə)ri/ /pəːˈrəʊtət(ə)ri/adjective
1Passing through a series of terms or objects as if arranged in a circle, so that one passes from the last immediately to the first again. rare.
2 Medicine. Relating to or designating a form of nystagmus that occurs during, and in the direction of, rotation of the body.
Origin
Mid 19th century; earliest use found in Proceedings of the Royal Society of London. From per- + rotatory.