Motile (mobile) stage of the malaria parasite resulting from fertilisation of the macrogametocyte bymicrogametocyte(s) in the mosquito gut. After passing through the gut wall, it becomes an oocyst.
n. the motile elongated *zygote of the malarial parasite (*Plasmodium), formed after fertilization of the *macrogamete. The ookinete bores through the lining of the mosquito’s stomach and attaches itself to the outer wall, where it later forms an *oocyst.