ثعب

مَثْعَبٌ مثعب [The outlet, or place of outpouring, of the water of a watering-trough &c.;] the place of passage for the water, in the side of a wateringtrough or tank: and a channel, or conduit, for water: (KL:) pl. مَثَاعِبُ. (S, A.) You say مَثْعَبُ الحَوةَ [ The outlet for the water of the watering-trough or tank ]: (S, A:) and مَثْعَبُ السَّطْحِ [ the outlet for the water of the house-top ]: (A:) and مَثْعَبُ المَطَرِ [ the outlet, or channel, for the rain-water ]: (TA:) from ثَعَبَ المَاآءَ “he gave vent to the water,” or, “made it to flow forth,” &c. (A, TA.) And مَثَاعِبُ المَدِينَةِ, meaning The channels, or places of flowing, of the water of the city: (K, TA:) whence it appears that MF has erred in saying that مَثْعَبٌ signifies [only] a مِزْرَاب [or spout for conveying away water from a housetop &c.]: not a channel, or place of flowing. (TA.) [See also صُنْبُورٌ, and لَوْلَبْ.]