ro·ta·tive /ˈroˌtetɪv ||roˈ/
 (a.)迴轉的,循環的


 Ro·ta·tive a.  turning, as a wheel; rotary; rotational.
    This high rotative velocity of the sun must cause an equatorial rise of the solar atmosphere.   --Siemens.
 Rotative engine, a steam engine in which the reciprocating motion of the piston is transformed into a continuous rotary motion, as by means of a connecting rod, a working beam and crank, or an oscillating cylinder.

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