\Right"*hand`ed\, a.
1. Using the right hand habitually, or more easily than the
   left.
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. (Zo["o]l.) Having the whorls rising from left to right;
   dextral; -- said of spiral shells. See Illust. of
   {Scalaria}.
{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.