umbilical : Idioms & Phrases

• noun membranous duct connecting the fetus with the placenta
  umbilical.
  

WordNet

• . (a) (Anat.) The cord which connects the fetus with the placenta, and contains the arteries and the vein through which blood circulates between the fetus and the placenta; the navel-string. (b) (Bot.) The little stem by which the seeds are attached to the placenta; called also funicular cord.

Webster 1913

• noun protrusion of the intestine and omentum through a hernia in the abdominal wall near the navel; usually self correcting after birth
  omphalocele.
  

WordNet

• (Med.), hernia of the bowels at the umbilicus.

Webster 1913

• (Geom.), an umbilicus. See Umbilicus, 5.

Webster 1913

• (Anat.), the middle region of the abdomen, bounded above by the epigastric region, below by the hypogastric region, and on the sides by the lumbar regions.

Webster 1913

• noun a vein in the umbilical cord; returns nutrient blood from the placenta to the fetus
  vena umbilicalis.
  

WordNet

• noun membranous structure that functions as the circulatory system in mammalian embryos until the heart becomes functional
  vesicula umbilicus; vitelline sac; yolk sac.
  

WordNet

• (Anat.), a saccular appendage of the developing embryo, containing the nutritive and unsegmented part of the ovum; the yolk sac. See Illust. in Appendix.

Webster 1913