n. (Biol.) (a) One of the spores produced by an isosporous organism. (b) A zygospore. [ Webster 1913 Suppl. ]
n. [ Gr. &unr_; priv. + isospore. ] (Biol.) A sexual spore in which the sexes differ in size; -- opposed to isospore. [ Webster 1913 Suppl. ]