الثَّنُّ، بِالْكَسْرِ: يَبِيسُ الْحُلِيِّ وَالْبَهْمَى وَالْحَمْضِ إِذَا كَثُرَ وَرَكِبَ بَعْضُهُ بَعْضًا
The thinn, with kasra: is the dried herbage of thorny plants, desert shrubs, and saltworts when they are abundant and piled upon each other.
وَقِيلَ: هُوَ مَا اسْوَدَّ مِن جَمِيعِ الْعِيدَانِ وَلَا يَكُونُ مِنْ بَقْلٍ وَلَا عُشْبٍ
And it is said: it is what has blackened from all types of wood, and is not from herbs or grass.
الثَّنُّ حُطَامُ الْيَبِيسِ
The thinn is the broken fragments of dry herbage.
فَظَلْنَ يَخْبِطْنَ هَشِيمَ الثَّنِّ، ... بَعْدَ عَمِيمِ الرَّوْضَةِ الْمُغْنِ
So they kept trampling the dry, brittle material of the thinn, ... after the abundant, flourishing meadow.
إِذَا تَكَسَّرَ الْيَبِيسُ فَهُوَ حُطَامٌ، فَإِذَا ارْتَكَبَ بَعْضُهُ عَلَى بَعْضٍ فَهُوَ الثَّنُّ، فَإِذَا اسْوَدَّ مِنَ الْقِدَمِ فَهُوَ الدَّنْدَنُ
When dry herbage breaks, it is hutam; when it piles upon itself, it is thinn; and when it blackens with age, it is dandan.
وَقَالَ ثَعْلَبٌ: الثَّنُّ الْكَلَأُ
And Tha'lab said: The thinn is fodder.
تَكْفِي اللُّقُوحَ أَكْلَةٌ مِنْ ثَنٍّ، ... وَلَمْ تَكُنْ آثَرَ عِنْدِي مِنِّي
A single meal of thinn suffices the milk-giving camel, ... and it was not more cherished by me than myself.
ابْنُ الْأَعْرَابِيِّ: الثَّنَانُ النَّبَاتُ الْكَثِيرُ الْمُلْتَفُّ
Ibn al-A'rabi: Al-thanan is abundant, intertwined vegetation.
وَقَالَ: ثَنْثَنَ إِذَا رَعَى الثَّنَّ
And he said: thanthana if he grazed on the thinn.
وَقَالَ: نَثْنَثَ إِذَا عَرِقَ عَرَقًا كَثِيرًا
And he said: nathantha if he sweated profusely.
الْجَوْهَرِيُّ: الثَّنَّةُ الشَّعَرَاتُ الَّتِي فِي مُؤَخِّرِ رِسْغِ الدَّابَّةِ الَّتِي أَسْبَلَتْ عَلَى أُمِّ الْقِرْدَانِ تَكَادُ تَبْلُغُ الْأَرْضَ، وَالْجَمْعُ الثَّنَنُ
Al-Jauhari: The thannah is the hairs at the back of the animal's fetlock that hang down, almost reaching the ground; the plural is al-thanan.
فَبِتُّ أُمِّرْهَا وَأَدْنُو لِلثَّنَنِ، ... بِقَاسِحِ الْجِلْدِ مَتِينٍ كَالرَّسَنِ
So I spent the night tending to her, and drawing near to the fetlock tufts, ... on a tough-skinned, strong one like a rope.
وَالثَّنَّةُ مِنْ فَرَسٍ: مُؤَخِّرُ الرِّسْغِ، وَهِيَ شَعَرَاتٌ مُدْلَاةٌ مُشْرِفَاتٌ مِنْ خَلْفٍ
And the thannah of a horse: the back of the fetlock, and it is hanging hairs, prominent from behind.
لَهَا ثَنَنٌ كَخَوَافِي الْعُقَابِ، ... سُودٌ يُفِيضْنَ، إِذَا تَزَبْأَرَّ
She has tufts like the feathers of an eagle, ... black, abundant, when she stands tall.
وَفِي حَدِيثِ فَتْحِ نَهَاوَنْدَ: وَبَلَغَ الدَّمُ ثَنَنَ الْخَيْلِ
And in the hadith of the conquest of Nahavand: And the blood reached the fetlock tufts of the horses.
وَثَنَّنَ الْفَرَسُ: رَفَعَ ثِنَّتَهُ أَنْ يَمَسَّ الْأَرْضَ فِي جَرْيِهِ مِنْ خِفَّتِهِ
And the horse thannana: raising its fetlock so as not to touch the ground in its run due to its lightness.
فِي وَظِيفَيْ الْفَرَسِ ثَنَتَانِ، وَهُوَ الشَّعَرُ الَّذِي يَكُونُ عَلَى مُؤَخِّرِ الرِّسْغِ
On the two pasterns of the horse are two thananat, which is the hair that is on the back of the fetlock.
ابْنُ الْأَعْرَابِيِّ: الثَّنَّةُ مِنَ الْإِنْسَانِ مَا دُونَ السُّرَّةِ فَوْقَ الْعَانَةِ أَسْفَلَ الْبَطْنِ، وَمِنَ الدَّوَابِّ الشَّعَرُ الَّذِي عَلَى مُؤَخِّرِ الْحَافِرِ فِي الرِّسْغِ
Ibn al-A'rabi: The thannah in a human is what is below the navel, above the pubic area, the lower abdomen; and in animals, it is the hair on the back of the hoof at the fetlock.
وَثَنَّنَ الْفَرَسَ إِذَا رَكِبَهُ الثَّقِيلُ حَتَّى تُصِيبَ ثِنَّتُهُ الْأَرْضَ
And the horse thannana if a heavy person rode it until its fetlock touched the ground.
وَقِيلَ: الثَّنَّةُ شَعَرُ الْعَانَةِ
And it was said: The thannah is the pubic hair.
وَاللهِ مَا وَجَدْتُهُ فِي قُطْنٍ وَلَا ثَنَّةٍ وَمَا وَجَدْتُهُ إِلَّا عَلَى ظَهْرِ كَبِدِي
By God, I did not find it in the lower back nor the lower abdomen, but I found it only on my liver.
فَشَقَّ مَا بَيْنَ صَدْرِهِ إِلَى ثَنَّتِهِ
So he split what was between his chest and his lower abdomen.