Cauls refers to a piece of membrane that covers a newborn's head during delivery. It is also known as a veil that appears to be a sign of good luck or protection. There are various terms related to Cauls that can be used to describe it. One of the synonyms for Cauls is amniotic sac, which is a membranous bag that contains the fetus and amniotic fluid. Another synonym for Cauls is birth veil, which is a name given to the membrane when it detaches and covers the baby's face. Other related terms for Cauls include birth shroud, head veil, and hood. Regardless of the term used, Cauls is a fascinating subject that has long been associated with superstition and mythology.