سِينٌ
Root: سين
Full Definition
سِينٌ
One of the letters of the alphabet: [i. e., the name of that letter: (see art. س:)] of the masc. gender as being supposed to be a حَرْف [or letter], and fem. as being supposed to be a كَلِمَة [or word]. The saying فُلَانٌ
لَا يَحْسِنُ سِنَهُ means Such a one will not form well one of the three شُعَب [i. e. teeth, or cusps,] of his
س.