arch board: Meaning and Definition of

arch' board"

Pronunciation: [key]
— Naut. Naut.
  1. a distinctive area at the upper part of a stern, curving upward toward the center and giving the name and port of the vessel within a carved and painted frame; escutcheon.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.