rhe·o·tax·is 
(rē′ə-tăksĭs)
(rē′ə-tăksĭs)n.
Movement of an organism in response to a current of water.
rhe′o·tactic (-tăktĭk) adj.
- concretionary
- concretism
- concretist
- concretization
- concretize
- concubinage
- concubine
- concupiscence
- concupiscent
- concupiscible
- concur
- concurrence
- concurrency
- concurrent
- concurrently
- concurrent resolution
- concuss
- concussion
- concussive
- concussively
- condemn
- condemnable
- condemnation
- condemnatory
- condemner