| REC | in a mutual or shared manner |
|---|---|
| REC | (often followed by `for') in exchange or in reciprocation |
| REC | alternate the direction of motion of |
| REC | act, feel, or give mutually or in return |
| REC | moving alternately backward and forward |
| REC | an internal-combustion engine in which the crankshaft is turned by pistons moving up and down in cylinders |
| REC | mutual interaction |
| REC | alternating back-and-forth movement |
| REC | the act of making and return or doing something in return |
| REC | given or done or owed to each other |
| REC | moving alternately backward and forward |
| REC | mutual exchange of commercial or other privileges |