chorionic villus sampling: Meaning and Definition of

chorion'ic vil'lus sam"pling

Pronunciation: [key]
  1. a prenatal test for detecting birth defects at an early stage of pregnancy, involving removal by needle of fluid from the chorionic villus, and examination of the cells obtained.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.