صدأ1 صَدِئَ, (S, M, L, K,) aor. ـَ (L,) inf. n. صَدَأٌ, (S, M,) said of a horse, (K, TA,) and of a kid, (S, TA,) [or a goat,] He was of the colour termed صُدْأَة [i. e. sorrel inclining to blackness; or blackness intermixed, or tinged over, with redness; or a colour like that of the rust of iron; probably  from the same verb in the sense next following]; (S, M, L, K, TA;) as also صَدُؤَ, (K,) aor. ـُ (TA; [and it is implied in the K that the latter verb is syn. with the former in all its senses;]) but the former verb is that which is commonly known, and that alone which is required by analogy as a verb denoting a colour, and the latter is not known to have been heard; (MF, TA;) and in the L it is said that the verb in this sense is صَدِئَ and ↓ اِصَّدَأَ, this latter [formed from اِصْطَدَأَ, originally اِصْتَدَأَ,] of the measure اِفْتَعَلَ. (TA.) b2:  Also, (M, K,) صَدِئَ, (S, M, Msb, K,) aor. as above, (S, Msb, TA,) and so the inf. n., (S, TA,) said of iron, It was, or became, rusty, or rusted; (S, M, Msb, K;) in which sense it is said also of the like of iron. (M.) A2:  and صَدِئَ said of a man, He stood erect, and looked. (K.) A3:  صَدَأَ المِرْآةَ, aor. ـَ (K,) inf. n. صَدْءٌ, (TK,) He polished the mirror, (K, TA,) i. e., removed from it the rust, (TA,) in order to use it as a collyrium; (K, TA;) as also ↓ صَدَّأَهَا, (K,) inf. n. تَصْدِئَةٌ. (TA.) [Whether the mirrors of the Arabs were made of bronze, or of what other metal they were made, is not said. See also 1 in art. حلأ.]A4:  And, aor.  as above, said of an owl, He uttered a cry or cries. (Sh, TA. [See also art. صدو.]) 2 صَدَّاَ see the preceding paragraph.5 تصدّأ لَهُ, (K,) as also تصدّع له, (TA,) i. q.  تصدّى له, (K, TA,) which is the original, meaning تعرّض له [i. e. He addressed, or applied, or directed, himself, or his regard, or attention, or mind, to him, or it; &c.]. (TA.) 8 اِصَّدَأَ: see 1, first sentence.صَدَأٌ inf. n. of صَدِئَ [q. v.]. (S, M.) b2:  Also [a subst.] signifying The rust of iron, (S, M, * TA,) and of copper and the like. (Har p. 481. [But there erroneously written صدآء.]) 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.]) صَدِئٌ [part. n. of صَدِئَ, q. v.]. b2:  One says, يَدِى مِنَ الحَدِيدِ صَدِئَةٌ My hand is disagreeable in smell [from the rust of iron]. (S.) b3:  and هُوَ صَاغِرٌ صَدِئٌ (assumed tropical:)  He is one to whom disgrace, or shame, and baseness, or meanness, attach. (S, K.) b4:  See also أَصْدَأُ.صُدْأَةٌ, (S, M, K,) in a horse, (S, K,) and in a goat, or kid, (S,) A sorrel colour (شُقْرَةٌ) inclining  to blackness, (M, K, TA,) the latter predominating: (TA:) or blackness intermixed, or tinged over, with redness [app. like the rust of iron]. (S.) أَصْدَأُ, (S, M, K,) applied to a horse, (K, TA,) or to a kid, (TA,) Of a sorrel colour (i. e. of the colour termed شُقْرَة) inclining to blackness, (M, K, TA,) the latter predominating: (TA:) or, applied to a horse, and to a goat, or kid, (S,) or applied to a kid, (K,) of a black colour intermixed, or tinged over, with redness [app. like the rust of iron]: (S, K:) fem. صَدْآءُ (S, M, K,) and ↓ صَدِئَةٌ. (M, L, TA.) And كُمَيْتٌ أَصْدَأُ [A bay, or dark bay, or brown, horse,] tinged over with dinginess. (S.) b2:  Also Rusty, or rusted; applied to iron and the like. (M.) b3:  And [hence] كَتِيبَةٌ صَدْآءُ, (M, and so in copies of the K,) or صَدْأًى, (K accord. to the TA,) and the former also, (TA,) [A body of troops having their arms or armour] overspread with the rust of iron. (M, K.) b4:  and صَدْآءُ A land (أَرْضٌ) of which the stones are of a red colour inclining to blackness, and rugged, not even with the ground, these stones having beneath them [other] rough stones, or, sometimes, soil and stones. (Sh, L.)