noun
Transept
The transversal part of a church, which crosses at right angles to the greatest length, and between the nave and choir. In the basilicas, this had often no projection at its two ends. In Gothic churches these project greatly, and should be called the arms of the transept. It is common, however, to speak of the arms themselves as the transepts.
Debout dans la nef de la cathédrale, on pouvait voir les bras nord et sud du transept s'étendant de part et d'autre, formant la forme d'une croix.