Webster’s Revised Unabridged Dictionary · 1913
Gamogenesis
Gam′o·gen′e·sis (găm′ō·jĕn′ē·sĭs), n. [Gr. γάμος marriage + E. genesis.] (Biol.) The production of offspring by the union of parents of different sexes; sexual reproduction; — the opposite of agamogenesis.