nAplustre(Rom. Antiq) An ornamental appendage of wood at the ship's stern, usually spreading like a fan and curved like a bird's feather.
Century Dictionary and Cyclopedia
naplustreThe ornament rising above the stern of ancient ships. Though varying much in design, these ornaments were often very graceful, particularly in Greek examples. A usual form was a sheaf or plume of volutes, variously combined. The aplustre rose immediately behind the steersman, and is often represented as supporting a flag. As a conspicuous part of the ship, it was often removed as a trophy by captors. Also called aphlaston.
Chambers's Twentieth Century Dictionary
nAplustreap-lus′tėr the ornament rising above the stern of ancient ships, often a sheaf of volutes.