ˌdrepənōˈfīkəs noun
Usage: capitalized
Etymology: New Latin, probably from drepano- (from Greek drepanē, drepanon sickle) + -phycus (from Greek phykos seaweed) — more at fucus
: a genus of very large Devonian fossil plants resembling and prob. closely related to the psilophytons but distinguished by spiny verticellate or spiral appendages resembling leaves and sometimes having sporangia in their axils