تَعَامُلٌ

is synonym with ↓ مُعَامَلَةٌ [generally as meaning The dealing together in buying and selling, and the like]. (TA.) One says, تعامل النَّاسُ بِالدَّرَاهِمِ [Men, or the people, dealt together in buying and selling with the dirhems; i. e. used the dirhems in buying and selling]. (Msb in article روج.) And يُتَعَامَلُ بِهِ [The business of buying and selling is transacted with it; i. e. it is used in buying and selling]; referring to the [coin called] فَلْس. (Msb in article فلس.)