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  1. Oxford American Dictionary

    chorionic villus sampling

    • IPA[ˌkôrēˌänik ˈviləs ˈsamp(ə)liNG]
    • n.
      a test made in early pregnancy to detect congenital abnormalities in the fetus. A tiny tissue sample is taken from the villi of the chorion, which forms the fetal part of the placenta.

    • noun: chorionic villus sampling