agamete /āgam″ēt/ [Gk, a + gamos, not marriage] , 1. any of the unicellular organisms, such as bacteria and protozoa, that reproduce asexually by multiple fission instead of by the production of gametes. 2. any asexual reproductive cell, such as a spore or merozoite, that forms a new organism without fusion with another gamete. See also fungus. −agamic, –agamous, agametic, adj.