From 'alah (in the original sense of strength); the stout part, i.e. The fat tail of the Oriental sheep -- rump.
see HEBREW 'alah
H451. alyah
אַלְיָה noun feminine fat tail of sheep, still accounted a delicacy in the East; (Mishna id. אַלִּיתָא אַלְיְתָה, ᵑ7,, etc.; Arabic , compare FlTWB i. 418 a) Exodus 29:22; Leviticus 3:9; 7:3; 8:25 (all "" חֵ֫לֶב); 9:19, probably also 1 Samuel 9:24 for הֶעָלֶיהָ see Gei Dr (compare TristrNat. Hist. Bib. ch. vi RiHWB Schafe SmithDict. Bib. Sheep).