Caul
Easton's Dictionary
(Heb. yothe’reth; i.e., “something redundant”), the membrane which covers the upper part of the liver (Ex. 29:13, 22; Lev. 3:4, 10, 15; 4:9; 7:4; marg., “midriff”). In Hos. 13:8 (Heb. seghor; i.e., “an enclosure”) the pericardium, or parts about the heart, is meant.
Smith's Dictionary
a sort of ornamental head-dress, (Isaiah 3:18) with a net for its base. The name is derived from the caul, the membranous bag which encloses the heart—the pericardium.—ED.