The Collaborative International Dictionary of English v.0.48:

Lapstreak \Lap"streak`\, Lapstrake \Lap"strake`\, lap-streaked
\lap-streaked\, lap-straked \lap-straked\a.
   Made with boards whose edges lap one over another;
   clinker-built; -- said of boats. Contrasted with
   carvel-built.

   Syn: lap-jointed, overlapping.
        [1913 Webster]