Her arm rotated around, searching for the contact of the one person who could save her.
An arm rotated the record to the vertical and let it roll against a soft bumper of felt.
It's not a wrist snap; your hand and arm are rotating as a unit.
At least one manufacturer offers a crankset in which the crank arms may rotate independently.
When exposed to rays of light or heat, the arms rotate.
The particles became more active, the little arms rotating in a way that drove them up the gradient, toward the higher concentration of sugar.
The arm rotates at up to 13 revolutions per minute, producing an acceleration of 3.5 g on the riders.
The arms in turn would either pivot or rotate together as a single unit about the top of the supporting column.
His old watch just sat there while Snoopy's arms rotated merrily.
In synchronization with this movement, the left arm rotates forward over the head, also making a complete circle.
