Tasensartut (s Tlatint: taxinomia, Seg Tagrikt tamzikt: «τάξις= Asnay» d «νόμος= Tarrayt») d tussna yezzin ɣef usenmel d usemmi n yimuddiren (iɣersiwen, imɣan, adalen... Atg).[1][2][3] Tasensartut teqqen s talɣa tuntimt yakk d usesmel n tesnudert i yimuddiren.
Kuyas i d-ttilin isesmilen isnudranen ttwasɣersen s ubellez amnursuy, ttwasunɣen s telɣa n waddag neɣ tikwal ttwagnsasen s talɣa n iɣawasen imassaɣen i wakken ad tetwaskin (ad tettwabnan) s tmuskiwin tiẓeṭṭanin anda deg kra n isesmilen yezmer ad yegber yiwen n wegmam deffir-s aṭas n yimrawen d yiẓuṛan. Amdya, aɣeṛda deg uɣawas amassaɣ yezmer ad ibin s ddaw n temseɣẓaẓ nniden i d-tizwaren neɣ inegren, neɣ s ddaw n temseɣẓaẓ nniden i d-t-yugaren deg wedras.