PRONUCLEUS FEMALE
\pɹˈɒnjuːklˌɪəs fˈiːme͡ɪl], \pɹˈɒnjuːklˌɪəs fˈiːmeɪl], \p_ɹ_ˈɒ_n_j_uː_k_l_ˌɪ__ə_s f_ˈiː_m_eɪ_l]\
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A small body, lying at first near the periphery, just beneath the extrusion globules, and representing the portion of the nucleus of the ovum (see germinal vesicle, under vesicle) which remains after the extrusion of the polar globules. It sinks to or toward the center of the vitellus, where it usually remains, and must fuse with the male p. before segmentation can take place. A system of radiating lines runs out from it into the yolk, forming a starlike figure, the so-called female aster.
By Smith Ely Jelliffe
