One of the mysteries of the English language finally explained.
A partition separating two chambers, such as that between the nostrils or the chambers of the heart.
- ‘The ventricular septum and the atrioventricular and semilunar valves were unremarkable.’
- ‘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.’
- ‘As in most species of balsaminoid Ericales, raphides are found in the septa of the locule wall.’
- ‘This area includes the anterior end of the inferior turbinate, the adjacent septum and the caudal edge of the upper lateral cartilages.’
Mid 17th century: from Latin septum, from sepire ‘enclose’, from sepes ‘hedge’.
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