ṣadā^un SadaA^N صَدَأٌ Bookmark Bookmarked Share 1.verbal noun of صَدِيءَ [q. v.]. (S, M.) 2.Also [a subst.] signifying The rust of iron, (S, M, * TA,) and of copper and the like. (Har p. 481. [But there erroneously written صداء.])3. -A2- Also A man slender in body; (K, TA;) light, or active, therein: its ء is said to be substituted for ع. (TA. [See صَدَعٌ; and see also صَدًى.])