fertilization membrane — noun the membrane that forms around a fertilized ovum and prevents penetration by additional spermatozoon • Hypernyms: ↑membrane, ↑tissue layer * * * noun : a resistant membranous layer that separates from the surface of many eggs immediately… … Useful english dictionary
fertilization membrane — noun Date: 1931 a resistant membranous layer in eggs of many animals that forms following fertilization by the thickening and separation of the vitelline membrane from the cell surface and that prevents multiple fertilization … New Collegiate Dictionary
fertilization membrane — A delicate membrane that grows outward from the point of contact of the egg and spermatozoon and rapidly covers the surface of the egg … Dictionary of invertebrate zoology
fertilization — fertilizational, adj. /ferr tl euh zay sheuhn/, n. 1. an act, process, or instance of fertilizing. 2. the state of being fertilized. 3. Biol. a. the union of male and female gametic nuclei. b. fecundation or impregnation of animals or plants. 4.… … Universalium
Fertilization — is the process of combining the male gamete, or "sperm," with the female gamete, or "ovum." The product of this combination is a cell called a zygote. * * * The process beginning with penetration of the secondary oocyte by the … Medical dictionary
membrane — 1. A thin sheet or layer of pliable tissue, serving as a covering or envelope of a part, as the lining of a cavity, as a partition or septum, or to connect two structures. SYN: membrana [TA]. 2. SYN: biomembrane. [L. membrana, a skin or m … Medical dictionary
fertilization — n. the fusion of a spermatozoon and an ovum. Rapid changes in the membrane of the ovum prevent other spermatozoa from penetrating. Penetration stimulates the completion of meiosis and the formation of the second polar body. Once the male and… … The new mediacal dictionary
vitelline membrane — noun Date: 1845 a membrane enclosing an egg that comprises the zona pellucida in mammals and that upon fertilization splits off from the surface of the egg forming a fertilization membrane in many invertebrates and amphibians and in some fish … New Collegiate Dictionary
Vitelline membrane — Infobox Embryology Name = Vitelline membrane Latin = m. vitellina GraySubject = 5 GrayPage = 45 Caption = Caption2 = System = CarnegieStage = Days = Precursor = GivesRiseTo = MeshName = Vitelline+membrane MeshNumber = A16.631.886 DorlandsPre = m… … Wikipedia
lipoid membrane — see fertilization membrane … Dictionary of invertebrate zoology
