GRAAFIAN VESICLE
\ɡɹˈɑːfi͡ən vˈɛsɪkə͡l], \ɡɹˈɑːfiən vˈɛsɪkəl], \ɡ_ɹ_ˈɑː_f_iə_n v_ˈɛ_s_ɪ_k_əl]\
Definitions of GRAAFIAN VESICLE
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By Willam Alexander Newman Dorland
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See under vesicle.
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Syn. : follicle of de Graaf, ovarian follicle. A closed sac which contains the ovarian ovum. It consists of an external membrane lined with small granular cells (the membrana granulosa) which are condensed at one point to form the discus proligerus. Prior to the ripening of the ovum the v. is situated within the stroma of the ovary, but as maturation advances it becomes superficial, its walls grow vascular, and it is distended with a serous fluid. It finally ruptures, allowing the ovum to escape.
By Smith Ely Jelliffe
Word of the day
Snake's-head
- Guinea-hen flower; -- so called in England because its spotted petals resemble the scales of a snake's head.