• See under Embryonic.
(from the article `angiosperm`) The female gametophyte of angiosperms (called the embryo sac) is tiny and contains only a few (typically eight) nuclei; the cytoplasm associated more ... ...has one or two coats, or integuments, except for an opening (micropyle) at one end; the sporangium with an integument is called the ovule. The ... ...
Em'bry·o sac` (Botany) See under Embryonic . 
the megaspore of a seed-bearing plant, situated within the ovule, giving rise to the endosperm and forming the egg cell or nucleus from which the embryo plant develops after fertilization.