ثمد

ثَمَدٌ ثمد (T, S, M, A, K) and ↓ ثَمْدٌ (S, M, K) and ↓ ثِمَادٌ, (M, K,) or the last is a pl. of one of the two preceding words, (MF,) Water that is little in quantity, (Lth, T, S, M, K,) that has no continual increase: (S, M, A, K:) or a little water remaining in a tract of hard, or hard and level, ground: or what appears in winter and goes away in summer (الصَّيْف): (M, K:) or a small round hollow or cavity (قَلْت) in which the rainwater collects and from which men drink during two months of the spring-season (الصَّيْف), but which fails when the summer (القَيْظ) comes: (IAar, T:) and rain-water that remains retained beneath the sand, and, when this is removed, is yielded by the ground: (A:) pl. ثِمَادٌ (T, A) and أَثْمَادٌ [a pl. of pauc.]: (so in the L:) some say that ثِمَادٌ signifies holes dug or excavated, in which is a little water; and hence A'Obeyd says, سُجِرَتِ الثِّمَادُ, meaning that the holes &c. were filled by the rain; but he does not explain it: (M:) or ثِمَادٌ signifies wells dug around a place which has been prepared to receive the water of the rain, where there is continually rain-water, this place having water-courses, and the said wells being filled therefrom: men drink the water that lies open to view until it becomes dried up by the effect of the hot winds of summer; the wells remaining. (Aboo-Málik, T.)