D defs.my
Entry 2 senses Webster, 1913

Oosphere

/(ō"ō̇*sfēr)/ · O·o·sphere · IPA /ˈoʊoʊˌsfɪ(ə)ɹ/
01 n. An unfertilized, rounded mass of protoplasm, produced in an oogonium.
  1. 1.
    An unfertilized, rounded mass of protoplasm, produced in an oogonium.(Bot.)
  2. 2.
    An analogous mass of protoplasm in the ovule of a flowering plant; an embryonic vesicle.(Bot.)