ثلث

مُثَلَّثٌ مثلث A thing having three angles or corners, triangular [or trilateral ]; a triangle. (S, K.) You say مُثَلَّثٌ حَادٌّ [ An acute-angled triangle ]: and مُثَلَّثٌ قَائِمٌ [ A right-angled triangle ]. (TA.) And أَرْضٌ مُثَلَّثَةٌ A three-sided piece of land. (TA.) ― -b2- A thing composed of three layers or strata, or of three distinct fascicles or the like; (M, TA;) [see also مَثْلُوثٌ;] and in like manner what are composed of four, and more, to ten [inclusive], are called by similar epithets: (TA:) or a thing of three folds. (Lth, T.) ― -b3- [As a conventional term in lexicology, A word having a letter which has any of the three vowels: ex. gr., بَدْأَةٌ is مُثَلَّثَةُ البَاآءِ; i. e., it is written بَدْأَةٌ and بُدْأَةٌ and بِدْأَةٌ. As such also, A verb having its عَيْن (or middle radical letter ) movent by any of the three vowels: ex. gr., بَهَأَ بِهِ is مُثَلَّثٌ; i. e., it is written بَهَأَ and بَهُؤَ and بَهِئَ. And as such, مُثَلَّثَةٌ (not مُثْلَثَةٌ) signifies Three-pointed; having three diacritical points: it is an epithet added to ثَاآء, to prevent its being mistaken for بَاآء or تَاآء or يَاآء.] ― -b4- Wine (شَرَاب) cooked until the quantity of two thirds of it has gone; (S, K;) the expressed juice of grapes so cooked. (Mgh.) ― -b5- And A certain electuary, or confection, of aromatics, or perfumes. (KL.)