When both outer and inner walls of the conidiogenous cell contribute to the formation of the blastoconidium. 
• (a.) Undergoing complete segmentation; composed entirely of germinal matter, the whole of the yolk undergoing fission; -- opposed to meroblastic.
(hōl″o-blas´tik) undergoing cleavage in which the entire zygote participates; completely dividing.
Hol`o·blas'tic adjective (Biol.) Undergoing complete segmentation; composed entirely of germinal matter, the whole of the yolk undergoing fission; -- opposed to meroblastic . 
Type: Term Pronunciation: hol′ō-blas′tik Definitions: 1. Denoting the involvement of the entire (isolecithal or moderately telolecithal) oocyte in cleavage.
(of certain eggs) undergoing total cleavage, resulting in equal blastomeres. Cf. meroblastic.