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Noun: septum (septa)  sep-tum
  1. (anatomy) a dividing partition between two tissues or cavities
    "The interventricular septum separates the left and right ventricles of the heart"
     
  2. A partition or wall especially in an ovary
    "The septum divides the ovary into separate chambers"

Derived forms: septa

Type of: partition, plant organ

Encyclopedia: Septum