IPA: /ˌkɔːrəʊˈteɪʃən/
KK: /kɔːrəʊˈteɪʃən/
The act of rotating together with another object or body, often used in the context of celestial bodies moving in sync with each other.
The corotation of the two planets creates a unique gravitational interaction.
Corotation is formed from "co-" (meaning together) and "rotation" (from Latin "rotatio", meaning a turning or a revolution). The word describes the phenomenon of two or more bodies rotating together around a common center.
Think of things 'turning together' ('co-') in a 'rotation' — that's what corotation means.