1. a wall of tissue that divides a body space or structure into two parts
Usage: anatomy
2. the wall of cartilage and bone that separates the nostrils
Usage: anatomy

Examples

• The nasal septum divides the nose into two nostrils.
• A deviated septum can cause breathing problems.
• The heart’s septum separates the left and right chambers.
• Surgery was needed to repair her damaged septum.
• The septum between the ventricles prevents blood from mixing.
• He broke his septum in a football accident.