Edward William Lane, An Arabic-English Lexicon, ث

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ثُرَيَّا ثري ثريا : see ثَرِىٌّ. ― -b2- الثُّرَيَّا [The Pleiades; the Third Mansion of the Moon: it is believed to be the most beneficial, in its influences on the weather, of all the Mansions of the Moon, on account of the period of its auroral setting, which, in central Arabia, about the commencement of the era of the Flight, began on the 12th of Nov., O. S.: (see مَنَازِلُ القَمَرِ, in art. نزل; and see also نَوْءٌ:) hence what is said of it in Job xxxviii. 31; and hence, as being the most excellent of all asterisms, it is called by the Arabs] النَّجْمُ [the Asterism]: (S, K:) the former appellation is given to it because it comprises, in appearance, many stars in a small space; (M, K; *) for it is said that amid its conspicuous stars are many obscure stars; (IAth, TA;) the number altogether being said to be four and twenty, agreeably with an assertion of the Prophet: some say that it is so called because of the abundance [of the rain] of its نَوٌء [here meaning auroral setting]: (TA:) the word is thus applied only in the dim. form, which is used in this instance to denote magnification. (M, TA.) ― -b3- [ثُرَيَّا also signifies (tropical:) A cluster of lamps, generally resting in holes in the bottom of a lantern: see an engraving in my “Modern Egyptians,” ch. vi.] The ثُرَيَّا of lamps is so called as being likened to the asterism above mentioned. (M.)