transept (n.)youdaoicibaDictYouDict[transept 词源字典]
"transverse section of a cruciform church," 1530s, from Medieval Latin transeptum, from Latin trans- "across" (see trans-) + saeptum "fence, partition, enclosure" (see septum). Rare before 1700. Related: Transeptal.[transept etymology, transept origin, 英语词源]