Suet
SUET (M. Eng. sewel, a diminutive of O. Fr. seu, suis, mod. suif, lard, from Lat. sebum, or sevum, tallow, grease, probably allied to sapo, soap), the hard flaked white fat lying round the kidneys of the sheep or ox; that of the pig forms lard. Beefsuet is especially used in cookery.
Note - this article incorporates content from Encyclopaedia Britannica, Eleventh Edition, (1910-1911)