Search Result for "chorionic villus":
Wordnet 3.0

NOUN (1)

1. one of the tiny villi that stick out of the fetal chorion and combine with the mother's uterine tissue to form the placenta; 



WordNet (r) 3.0 (2006):

chorionic villus
    n 1: one of the tiny villi that stick out of the fetal chorion
         and combine with the mother's uterine tissue to form the
         placenta