It is continued as a slender twig on the filum terminale. Thickening of the filum terminale is seen in over half of the cases. The word "file" derives from the Latin "filum" ("a thread"). Latin word filatorium place for spinning, from filare to spin, from Latin filum a thread. "Chorda filum" is similar to "Halosiphon tomentosus". "Chorda filum" is to be found in very sheltered shores. Words like "film" become "filum". However, the generic name, "Filipendula", comes from "filum", meaning "thread" and "pendulus", meaning "hanging".