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villus |
Also found in: Dictionary/thesaurus, Medical, Wikipedia, Hutchinson | 0.02 sec. |
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villus 1. Zoology anatomy any of the numerous finger-like projections of the mucous membrane lining the small intestine of many vertebrates 2. any similar membranous process, such as any of those in the mammalian placenta 3. Botany any of various hairlike outgrowths, as from the stem of a moss villus [′vil·əs] (anatomy) A fingerlike projection from the surface of a membrane. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Both amniocentesis and another procedure called chorionic villus sampling, in which doctors pluck bits of the placenta, isolate fetal cells that can reveal many genetic problems in an unborn baby with near certainty. Chorionic villus sampling, to detect genetic abnormalities in the embryo or fetus in the first trimester. Previously, the only way to know if a woman was having a baby with Down's was with second-trimester blood tests and/or invasive amniocentesis or chorionic villus sampling (CVS) tests, all of which carry a slight risk of miscarriage. |
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