Ascococcus \As`co*coc"cus\, n.; pl. {Ascococci}. [NL., fr. Gr. 'asko`s bladder, bag + ? kernel.] (Biol.) A form of micrococcus, found in putrid meat infusions, occurring in peculiar masses, each of which is inclosed in a hyaline capsule and contains a large number of spherical micrococci.