LIMB (az kalimai lotini «limbus» — tamga) – in halqai metallii hamvor, ki bo khathoi borik ba qismhoi barobar (masalan darajai, daqikaho va gayra) taqsim karda shudaast. Limb yake az qismhoi muhimtarini asbobhoi zoviyasanj (asbobhoi astronomi, geodezi, fiziki va gayra) buda, baroi hisob kardani buzurgihoi kunji, khizmat mekunad. Taqsimoti Limb bo yorii vernerho yo mikroskop — mikrometrho ba hisob girifta meshavad.