بِأَسْنَانِهِ أُشُرٌ
1.
and
أُشَرٌ and
أُشُورٌ (S, K,) which last is a plural, (K,) In his teeth is a serration, (S, K,) and a sharpness of the extremities [such as is seen in the teeth of young persons]; (S;) which is sometimes natural and sometimes artificial; (K;) and [naturally] only in the teeth of young persons. (TA.) Hence the prov., أَعْيَيْتَنِى
بِأُشُرِ فَكَيْفَ بِدُرْدُرٍ. (S.) [See article در]
2.