fertilization
41Double fertilization — The parts of a flower Double fertilization …
42cross-fertilization — /kraws ferr tl euh zay sheuhn, kros /, n. 1. Biol. the fertilization of an organism by the fusion of an egg from one individual with a sperm or male gamete from a different individual. 2. Bot. fertilization of the flower of one plant by a gamete… …
43self-fertilization — self fertilized, adj. /self ferr tl euh zay sheuhn, self /, n. 1. Bot. fertilization of an ovum of a plant by a male gamete from the same flower (opposed to cross fertilization). 2. Zool. fertilization of the ovum of a hermaphroditic animal by a… …
44in vitro fertilization — noun : fertilization of an egg in a laboratory dish or test tube ; specifically : fertilization achieved by the mixture usually in a laboratory dish of sperm with eggs that have been surgically removed from an ovary followed by implantation of… …
45Human fertilization — is the union of a human egg and sperm, usually occurring in the ampulla of the fallopian tube. It is also the initiation of prenatal development.Fertilization constitutes the penetration of the oocyte (egg) which the sperm performs, fusion of the …
46In vitro fertilization — IVF, a laboratory procedure in which sperm are placed with an unfertilized egg in a Petri dish to achieve fertilization. The embryo is then transferred into the uterus to begin a pregnancy or cryopreserved (frozen) for future use. IVF was… …
47External fertilization — is a form of fertilization in which a zilo cell is united with an egg cell external to the body of the female. Thus, the fertilization is said to occur externally . This is distinct from internal fertilization where the union of the egg and sperm …
48Internal fertilization — is a form of animal fertilization of an ovum by spermatozoon within the body of an inseminated animal, whether female or hermaphroditic. This is distinct from external fertilization, where the union of the ova and spermatoza occur outside of the… …
49Cross fertilization — Cross Cross (kr[o^]s), a. 1. Not parallel; lying or falling athwart; transverse; oblique; intersecting. [1913 Webster] The cross refraction of the second prism. Sir I. Newton. [1913 Webster] 2. Not accordant with what is wished or expected;… …
50in vitro fertilization — a specialized technique by which an ovum, esp. a human one, is fertilized by sperm outside the body, with the resulting embryo later implanted in the uterus for gestation. [1970 75] * * * ▪ medicine Introduction also called test tube conception …
