إِدَاوَةٌ

i. q. مِطهَرَةٌ; (S, M, Mgh, Msb, K;) i. e. A small vessel [or bag] of skin, made for water, like the سَطِيحَة: (TA:) or, as some say, only of two skins put face to face: (M, TA:) plural أَدَاوَى; (S, Mgh, Msb, K;) originally, by rule, أَدَايءِىُ; which is changed, as in the cases of مَطَايَا and خَطَايَا, from the measure فَعَايءِلُ to the measure فَعَالَى, so that the و in أَدَاوَى is a substitute for the augmentative ا in the singular, and the final alif [written ى] in أَدَاوَى is a substitute for the و in the singular (S.)

See also أَدَاةٌ.