gamotˈropism noun

The tendency of gametes to attract each other

-gamous adj combining form

1. Denoting: having a stated number of spouses, as in bigamous
2. Relating to a stated means of fertilization or reproduction, as in allogamous

-gamy n combining form

1. Denoting: marriage, or supposed marriage, to a stated number of spouses
2. A stated means of fertilization or reproduction