turtleback

/ˈtɜːrtl̩bæk/
noun
  1. A rounded, humped shape or structure that resembles the shell of a turtle.
    • The old car had a turtleback trunk that made it look like a vintage roadster.
    • Geologists studied the turtleback formation of the hill, shaped by ancient glaciers.
    • The backpack had a turtleback design to distribute weight evenly across the shoulders.
  2. A type of book binding with a rounded spine and flexible covers, often used for paperback books.
    • I bought a turtleback copy of the dictionary so it wouldn't fall apart in my bag.
    • Teachers prefer turtleback textbooks because they last longer than standard paperbacks.
    • The library ordered the new novel in a durable turtleback edition for heavy use.
  3. A protective cover or shield shaped like a turtle's shell.
    • The soldier wore a turtleback armor plate over his chest during the training exercise.
    • The robot was equipped with a turtleback casing to protect its internal circuits.
    • The ancient warrior's shield had a turtleback curve that deflected arrows easily.
Synonyms
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