Septum (disambiguation)

Septum or septa may refer to:
* Septum, a partition of two cavities or spaces
* Septum (marine biology), in marine biology, a thin membrane separating each shell chamber in cephalopods that retained their external shell
* Septum nasi or septum, the cartilage wall separating the nostrils
* Septum pellucidum or septum lucidum, a thin structure separating two fluid pockets in the brain
* Interatrial septum, the wall of tissue that separates the left and right atria of the heart
* Interventricular septum or median septum, the wall separating the left and right ventricles of the heart
* Lingual septum, a vertical layer of fibrous tissue that separates the halves of the tongue
* Orbital septum, a palpabral ligament in the upper and lower eyelids
* Uterine septum, a malformation of the uterus
* Septum, in mycology, the wall partitioning fungal hyphae into discrete cells
* Septation, microbiology, the process whereby a cell divides into two cells
* SEPTA, an acronym for the Southeastern Pennsylvania Transportation Authority