قثأ4 اقثأت الأَرْضُ, (Az, S, O,) or اقثأ المَكَانُ, (K,) The land, or the place, abounded with the [species of cucumber called] قِثّآء. (Az, S, O, K.) and اقثأ القَوْمُ The people had abundance of قثّآء. (S, O, K.) قِثَّآءٌ (S, O, Msb, K) and قُثَّآءٌ, (O, Msb, K,) the former of which, with kesr, in the more common, (Msb, TA,) [A certain vegetable,] well-known: (K, TA:) [a species of cucumber; cucumis sativus β fructu flavo majore: (Delile's Floræ Ægypt. Illustr., no. 928:]) or the [cucumber called] خِيَار [q. v.]: (S, O, K:) or a general name for the خِيَار, the عَجُور [q. v.], and the فَقُّوس [or فَقُّوص q. v.]: but some apply the name to a species resembling the خيار: (Msb, TA:) and it is said that it is lighter (أَخَفُّ) than the خيار: also that عَجُور signifies large قِثّآء: (TA:) the n. un. is قثّآءة. (S, O, Msb.) b2:  قِثَّآءُ الحِمَارِ see voce عَلْقَمٌ.مَقْثَأَةٌ and مَقْثُؤَةٌ, (S, O, K, TA,) or أَرْضٌ مَقْثَأَةٌ and مَقْثُؤَةٌ, (Msb,) A place, or land, of قثّآء, (S, Msb, K,) where قثّآء are sown and grow. (TA.)