Core sense — an outlet for water; a channel or conduit for watergenerated
1[The outlet for the water of the watering-trough or tank]—مَثْعَبُ الحَوةَ
[The outlet, or place of outpouring, of the water of a watering-trough and the like;] the place where the water passes out, in the side of a watering-trough or tank; also a channel, or conduit, for water. Plural مَثَاعِبُ.
[the outlet for the water of the house-top]—مَثْعَبُ السَّطْحِ
[the outlet, or channel, for the rain-water]—مَثْعَبُ المَطَرِ
From ثَعَبَ المَآءَ, "he gave vent to the water", or "made it flow forth", etc.
the channels, or places of flowing, of the water of the city—مَثَاعِبُ المَدِينَةِ
From this it appears that MF has erred in saying that مَثْعَبٌ means only a مِزْرَاب [or spout for carrying water away from a house-top and the like], and not a channel, or place of flowing.
See also صُنْبُورٌ and لَوْلَبْ.
Show Lane's original text
[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 المَآءَ “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 .]