PRIMITIVE CHORION
\pɹˈɪmɪtˌɪv kˈɔːɹi͡ən], \pɹˈɪmɪtˌɪv kˈɔːɹiən], \p_ɹ_ˈɪ_m_ɪ_t_ˌɪ_v k_ˈɔː_ɹ_iə_n]\
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The rudimentary chorion; a membranous product of the epithelial cells of the ovary and the oviduct deposited around the mature and fecundated ovum; a transformation of the vitelline membrane which becomes shaggy soon after its entrance into the uterus.
By Smith Ely Jelliffe
