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septum Line breaks: sep¦tum
Pronunciation: /ˈsɛptəm/

Definition of septum in English:

noun (plural septa ˈsɛptə)

chiefly Anatomy & Biology
A partition separating two chambers, such as that between the nostrils or the chambers of the heart.
Example sentences
  • At this stage also, minor septa and shortened cardinal septum become easily identifiable.
  • The trachea is unbranched, and is formed by the division of the foregut by a longitudinal septum into two tubes - the trachea and the esophagus.
  • The ventricular septum and the atrioventricular and semilunar valves were unremarkable.


Mid 17th century: from Latin septum, from sepire 'enclose', from sepes 'hedge'.

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