No - It's WALL
Definition for Caul:-
caul
noun
1. part of the peritoneum attached to the stomach and to the colon and covering the intestines [syn: greater omentum]
2. the inner membrane of embryos in higher vertebrates (especially when covering the head at birth)
Definition for Wall :-
wall
� noun 1 a continuous vertical brick or stone structure that encloses or divides an area of land. 2 a side of a building or room. 3 a protective or restrictive barrier: a wall of silence. 4 Soccer a line of defenders forming a barrier against a free kick taken near the penalty area. 5 the outer layer or lining of a bodily organ or cavity.