بسم

مَبْسِمٌ مبسم i. q. ثَغْرٌ (S, K,) meaning The front teeth: (TK:) [and sometimes, perhaps, the mouth: ] so called as being the place of التَّبَسُّم [or smiling: pl. مَبَاسِمُ]. (TA.) One says, [of women or girls,] هُنَّ غُرُّ المَبَاسِمِ [ They are white in the front teeth ]. (TA.)