Fat lining the abdomen and kidneys in hogs which is used to make lard WordNet 3.0 & Open English WordNet

The layers of fat that support the kidneys of a pig. Wiktionary

White lard made from fresh, clean, sound leaf (abdominal) fat of swine, reasonably free of blood, free of foreign odors and tastes, and having not more than set maxima of potassium hydroxide, peroxide, moisture, volatile matter, and insoluble impurities. Wiktionary