- that portion of the deck next below the spar-deck that is amongst the mainmast while the cabin.
- A shell associated with the genus Crepidula; a boat shell. See boat shell.
- See half-deck, under Deck.
- identify deck, 2.
- The slipper-limpet, Crepidula fornicata, or a related species, the shell being likened to a half-decked vessel.