خمطخَمْطٌ The [kind of tree called] أَرَاك: (Bd in xxxiv. 15:) or a species of the اراك, having a fruit which is eaten: (Lth, S:) or the fruit of the اراك: (IB, K:) or any trees having no thorns: (IDrd, Bd, K:) or trees having thorns; cited  from Fr; and by Z, in the Ksh, on the authority of A 'Obeyd: (TA:) or certain trees like the سِدْر, (K, TA,) the fruit of which is like the mulberry: (TA:) or certain deadly trees: (K:) or deadly poison: (TA:) or any plant that has acquired a taste of bitterness, (Zj, Bd, K,) so that it cannot be eaten: (Zj, TA:) or scanty fruit of any trees: (AHn, K:) or the fruit of what is called فَسْوَةُ الضَّبُعِ: (K:) or a certain fruit called فَسْوَةُ الضَّبُعِ, having the form of the poppy, friable, and of no use: (IAar:) or it signifies, in the Kur xxxiv. 15, fruit that is disagreeable in taste, and choking: (Bd:) or, [as an epithet,] bitter, and disagreeable in taste, and choking: (Jel:) or bitter; applied to anything: or acid. (K.) In the Kur, ubi suprà, some read, ذَوَاتَىْ أَكُلِ خَمْطٍ: (S, IB, Jel:) this is the right reading accord. to him who makes خمط to mean the اراك: but accord. to him who makes it to mean the fruit of the اراك, the right reading of اكل is with tenween, and خمط is a substitute for that word. (IB.) [The pl. is خِمَاطٌ: see an ex. voce  خَلٌّ.]