backworm

== English == === Etymology === From back +‎ worm. === Noun === backworm (countable and uncountable, plural backworms) (obsolete) (uncountable) Synonym of filanders (“a disease of hawks”). (countable) The thread-like worm found in filanders. === References === “backworm”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.