WordWeb Online

1. (often followed by 'for') in exchange or in reciprocation
   "gave up our seats on the plane and reciprocally received several hundred dollars and seats on the next plane out"
   - in return
    
2. In a mutual or shared manner
   "the goals of the negotiators were not reciprocally exclusive"
   - mutually
    
3. In an inverse or contrary manner
   "wavelength and frequency are, of course, related reciprocally"
   - inversely

See also: reciprocal