The Collaborative International Dictionary of English v.0.48:
Right-handed \Right"-hand`ed\, a.
1. Using the right hand habitually, or more easily than the
2. Having the same direction or course as the movement of the
hands of a watch seen in front; -- said of the motion of a
revolving object looked at from a given direction.
3. (Zool.) Having the whorls rising from left to right;
dextral; -- said of spiral shells. See Illust. of
Right-handed screw, a screw, the threads of which, like
those of a common wood screw, wind spirally in such a
direction that the screw advances away from the observer
when turned with a right-handed movement in a fixed nut.