资料来源 : pyDict

舷窗外盖

资料来源 : Webster's Revised Unabridged Dictionary (1913)

Deadlight \Dead"light`\, n. (Naut.)
   A strong shutter, made to fit open ports and keep out water
   in a storm.

资料来源 : WordNet®

deadlight
     n : a strong shutter over a ship's porthole that is closed in
         stormy weather