noun
: an early stage in the development of a female gametophyte or an embryo of most gymnosperms in which repeated nuclear divisions occur without cell-wall formation
noun
: an early stage in the development of a female gametophyte or an embryo of most gymnosperms in which repeated nuclear divisions occur without cell-wall formation
Webster's New International English Dictionary. Новый международный словарь английского языка Webster. 2012