Kalmar "sinus paranasales" tana nufin rukunin kogon da ke cike da iska da ke cikin ƙasusuwan da ke kewaye da kogon hanci. Musamman, "sinus" yana nufin sarari ko rami, yayin da "paranasal" yana nufin "kusa da hanci." Waɗannan cavities sun haɗa da sinuses na gaba (a cikin goshin), maxillary sinuses (a cikin cheekbones), sinuses na ethmoid (tsakanin idanu), da sinuses sphenoid (a bayan hanci). A dunkule, wadannan cavities ana kiransu da paranasal sinuses, kuma suna taka rawa wajen daidaita yanayin zafi da zafi na iskar da muke shaka, tare da ba da tallafi na tsari ga kwanyar.