אִיסָר, (contr. of איסהר, cmp. איסתירא, an adapt. of assarius = as) As, a Roman coin, usu. ¹/₂₄ of a Denar (v. Zuckerm. Talm. Gew. p. 22 sq.), called א׳ האיטלקי Italian As. Kidd. I, 1; a. fr.—Y. ibid. I, 58ᵈ הא׳ אחד מכ"ד וכ׳ the As is ¹/₂₄ of the silver Denar.—Trnsf. coin. Taan. 19ᵇ מדלית א׳ because there was a scarcity of coin.—Pl. אִיסָרִין. Y. Maas. Sh. IV, 55ᵇ top.—Chald. Kidd. 12ᵃ איסורי read אִיסָרֵי. [Gen. R. s. 42 א׳ לשם אלסר the Assar received its name from Elasar (Gen. XIV, 1), comment.; v. however next w.]