الأَرْبِعَاءُ

, [also written without tenween when not rendered determinate by the article or otherwise according to most authorities, who make it feminine, but with tenween when indeterminate according to those who make it masculine,] and الأَرْبَعَاءُ, (As, S, Msb, K,) the latter on the authority of some of the BenooAsad, (S, Msb,) and الأَرْبُعَاءُ, (As, Msb, K,) which is a form of the word seldom used, (Msb,) and الإِرْبِعَاءُ, and الإِرْبَعَاءُ, the last two mentioned by IHsh, the first of all the most chaste, (MF,) but it is the only singular word of its measure, (El- Kutabee, Msb,) except أَرْمِدَاءُ, (AZ, O,) the name of A certain day; (S, Msb, K;) [namely Wednesday;] the fourth day of the week; (L;) as also ↓ الرَّبُوعُ; but this is post-classical: (TA:) the dual of أَرْبِعَاء is أَرْبِعَاوَانِ; (L;) and the plural is أَرْبِعَاوَاتٌ, (S, L,) [according to those who make the singular feminine;] or the dual is أَرْبِعَاءَانِ, and the plural is أَرْبِعَاءَاتٌ; (K;) thus says Aboo-Jukhádib, regarding the noun as masculine: (Fr:) Aboo-Ziyád used to say, مَضَى الأَرْبِعَاءُ بِمَا فِيهِ [Wednesday passed with what (occurred) in it], making it singular and masculine [because he meant thereby يَوْمُ الأَرْبِعَاءُ]; but Abu-l-Jarráh used to say, مَضَتِ الأَرْبِعَاءُ بِمَا فِيهِنَّ, making it feminine and plural, and employing it like a n. of number: (Lh:) Th is related to have mentioned أَرَابِيعُ as a plural of الأَرْبِعَاءُ; but ISd says, I am not sure of this. (TA.) The word has no diminutive (Sb, S in article امس.)