in vitro

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in vi·tro / in ˈvēˌtrō/ • adj. & adv. Biol. (of processes or reactions) taking place in a test tube, culture dish, or elsewhere outside a living organism: [as adj.] in vitro fertilization. The opposite of in vivo.

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in vitro Describing biological processes that are made to occur outside the living body, in laboratory apparatus (literally ‘in glass’, i.e. in a test tube). In in vitro fertilization, mature egg cells are removed from the ovary of a woman unable to conceive normally and fertilized externally; the resultant blastocyst is implanted into her uterus. Compare in vivo.

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in vitro Literally ‘in glass’, but applied more generally to studies on living material that are performed outside the living organism from which the material is derived. Examples include the use of a perfused organ, tissue cultures, cell homogenates, and subcellular fractions.

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in vitro Literally ‘in glass’; used to indicate an observation made experimentally in the test‐tube, as distinct from the natural living conditions, in vivo.

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in vitro Literally, ‘in glass’, but applied more generally to studies on living material which are performed outside the living organism from which the material is derived. Examples include the use of tissue cultures, cell homogenates, and subcellular fractions.

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in vitro Literally, ‘in glass’, but applied more generally to studies on living material that are performed outside the living organism from which the material is derived. Examples include the use of tissue cultures, cell homogenates, and subcellular fractions.

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in vitro (in vee-troh) Latin: describing biological phenomena that are made to occur outside the living body (traditionally in a test-tube).