septum (n.)youdaoicibaDictYouDict[septum 词源字典]
"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.[septum etymology, septum origin, 英语词源]