Definition of contra-rotating in English:

contra-rotating

adjective

  • Rotating in the opposite direction or in opposite directions, especially about the same shaft.

    • ‘With its wings folded and contra-rotating propellers missing, the former fighter was neatly parked between two of the unit's wooden huts.’
    • ‘However, most designs still had two or more contra-rotating blades to solve the torque problem and this caused highly complex and unsound craft.’
    • ‘The valves are actuated via drag arms from twin, contra-rotating camshafts.’
    • ‘Another benefit was that the contra-rotating propellers eliminated torque.’
    • ‘The twin rotor mechanism seems very accurate for scale and is contra-rotating, an unexpected bonus on a model.’

Pronunciation:

contra-rotating

/kɒntrərəʊˈteɪtɪŋ/