فَسْوَةٌ

[is the verbal noun of unity of فَسَا, as such signifying A single noiseless emission of wind from the anus: and] has for its plural [فَسَوَاتٌ, agreeably with rule, and also] فُسًى, which is [anomalous,] like شُهًى plural of شَهْوَةٌ, which see. (TA.)

لَيْسَ لَهُ إِلَّا فَسْوَةُ الضَّبُعِ [the lit. signification of which is sufficiently plain] occurs in a tradition as meaning (assumed tropical:) There is not any benefit, or profit, or utility, attributable to it; [or rather, it is worse than useless;] the ضبع [or hyena] being particularized because of its stupidity and its evil nature: or, some say, it [i. e. فسوة الضبع, and apparently ↓ الفُسَاةُ also (mentioned among the addenda to this article in the TA),] is a plant (شَجَرَةٌ) like the خَشخَاش [or poppy], from the fruit of which no great utility is derived: so says IAth. (TA.) [See also خَمْطٌ, in two places.]

فَسَوَاتُ الضِّبَاعِ is an appellation of Certain truffles (كَمْأَةٌ); (K;) a species of كَمْأَة; (M;) said by AHn to be the species thereof called القَعْبَلُ; (M, TA;) and the like is said in the Minháj; and further, that it is a plant of disagreeable odour, having a head which is cooked, and eaten with milk; and when it dries, there comes forth from it what resembles وَرْس [q. v.]. (TA.)