יֹתֶרֶתyôthereth

the lobe or flap of the liver (as if redundant or outhanging)

Pronunciation: yo-theh'-reth · Hebrew/Aramaic (Old Testament) · H3508

Meanings

most probably (fat) appendage, a (fatty) mass at opening of liver of sacrificial animal, extending to kidneys (Leviticus 3:4; Exodus 29:13; Leviticus 3:10; Leviticus 3:15; Leviticus 4:9)

Same root

יָתַרyâthar · H3498to jut over or exceed; by implication, to excel; (intransitively) to remain or be left; causatively, to leave, cause to abound, preserve

Where it appears

Appears 11 times in the Bible.

Exodus 29:13 Take all the fat around the internal organs, the long lobe of the liver, and the two kidneys and the fat around them, and burn it all on the altar.
Exodus 29:22 “Since this is the ram for the ordination of Aaron and his sons, take the fat of the ram, including the fat of the broad tail, the fat around the internal organs, the long lobe of the liver, and the two kidneys and the fat around them, along with the right thigh.
Leviticus 3:4 the two kidneys and the fat around them near the loins, and the long lobe of the liver. These must be removed with the kidneys,
Leviticus 3:10 the two kidneys and the fat around them near the loins, and the long lobe of the liver. These must be removed with the kidneys,
Leviticus 3:15 the two kidneys and the fat around them near the loins, and the long lobe of the liver. These must be removed with the kidneys,
Leviticus 4:9 the two kidneys and the fat around them near the loins, and the long lobe of the liver. He must remove these along with the kidneys,

See every passage

Exodus 29:13, 29:22
Leviticus 3:4, 3:10, 3:15, 4:9, 7:4, 8:16, 8:25, 9:10, 9:19

Source: Brown, Driver and Briggs, Hebrew and English Lexicon of the Old Testament (1906), public domain; markup by unfoldingWord, CC BY (github.com/unfoldingWord/Brown-Driver-Briggs-Enhanced).