softshell

 
Pronunciation: /ˈsɒftʃɛl/
(also softshell turtle)

noun

  • a freshwater turtle with a flattened leathery shell, native to Asia, Africa, and North America.
    • Family Trionychidae: several genera and many species, including the spiny softshell (Apalone (or Trionyx) spinifera) of North America