- septum (n.)
- "partition between the nostrils," 1690s, Modern Latin, from Latin saeptum "a fence, enclosure, partition," from neuter past participle of saepire "to hedge in," from saepes "hedge, fence." Related: Septal.
- transept (n.)
- "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.