Mutuant

A mutuant is one of the participants occurring in a mutual situation (Haspelmath 2008:2088).

Origin
The term was coined by Haspelmath (2008).

Reference

 * Haspelmath, Martin. 2008. Further remarks on reciprocal constructions. In: Nedjalkov, Vladimir P. (ed.) Reciprocal constructions. Vol. 4. Amsterdam: Benjamins, 2087-2115.