A variant or archaic term, possibly referring to a banner or flags used in military or ceremonial contexts; exact definition is obscure.
Possibly from bandera (flag/banner) with a suffix, but the exact etymology is unclear. It may be a corruption or variant of banderol or banner-related terms.
Banderma is so obscure that even comprehensive dictionaries struggle with it—it's a word that might have existed in specialized medieval military terminology but got lost to time!
Complete word intelligence in one call. Free tier — 50 lookups/day.