A variant or archaic form, possibly relating to a receptor or one who receives/accepts something, though usage is unclear.
Possibly from Latin capere (to take/receive) + -or (agent suffix), though this term is archaic and may be obsolete. Its exact etymology and historical usage are not well-documented in modern sources.
Some words disappear from use—'ceptor' might have been a medieval or specialist term that simply got replaced by clearer alternatives like 'receptor,' and now it survives mainly in historical texts.
Complete word intelligence in one call. Free tier — 50 lookups/day.