Classical Arabic - English Dictionary

عَرْمَضَ, inf. n. عَرْمَضَةٌ and عِرْمَاضٌ, (Lḥ, O, Ḳ,) It (water) became overspread with عَرْمَض [q. v.]; (Lḥ, O;) i. q. طَحْلَبَ. (Ḳ.)

عَرْمَضٌ (Lth, Ṣ, O, Ḳ) andعِرْمَاضٌ↓ (IDrd, Ḳ, TA, written in the O عَرْمَاض) i. q. طُحْلُبٌ; (Ṣ, O, Ḳ;) i. e. The green substance that comes forth from the bottom of water, so as to overspread it; (Ṣ, O, L;) also called ثَوْرُ المَآءِ; [O; in the L, and in one copy of the Ṣ, ثَوْبُ المَآءِ, which is a mistake;] accord. to AZ; (Ṣ, O;) the green substance like خِطْمِىّ [or marsh-mallow], which is upon water; (Lḥ;) a soft green substance, like loosened and separated wool, upon stale water; so says Lth, and he adds his opinion that it is vegetative: (TA:) n. un. with ة {عَرْمَضَةٌ}. (Ḳ.)

Also the former, (O, Ḳ,) andعِرْمِضٌ↓, (El-Hejeree, Ḳ,) A sort of trees, of those called عِضَاه, (Lth, O, Ḳ,) having thorns like the beaks of birds; the hardest thereof in the wood: (Lth, O:) or the former, (O, Ḳ,) as some assert, (AḤn, O,) the small of the أَرَاك (AḤn, O, Ḳ) and of the سِدْر and of all trees that never become great: (Ḳ:) or small trees of those called سِدْر, that do not become large nor tall, of which the thorns are like the beaks of birds; the hardest thereof in the wood, and the best for bows: (IAạr, O:) or certain small trees: or the small of the عِضَاه: or the small of all trees: n. un. with ة {عَرْمَضَةٌ}. (O.)

مَآءٌ مُعَرْمِضٌ [so in the TA, agreeably with the verb; but in my two copies of the Ṣ, مُعَرْمَضٌ;] Water overspread, or becoming overspread, with عَرْمَض. (Ṣ, TA.)