Quiz: Remember the definition of mal de mer?
"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 sep·tum (sěp'təm)
n. pl. sep·ta (-tə)
A thin partition or membrane dividing two cavities or soft masses of tissue in an organism.
The septum pellucidum.