Definify.com
Webster 1913 Edition
Oosphere
O′o-sphere
(ō′ō̍-sfēr)
, Noun.
[Gr.
ω,ὄν
an egg + E. sphere
.] 1.
(Bot.)
An unfertilized, rounded mass of protoplasm, produced in an oogonium.
☞ After being fertilized by the access of antherozoids it becomes covered with a cell wall and develops into an oospore, which may grow into a new plant like the parent.
2.
(Bot.)
An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle.
Goodale.