Mossback Definition
 môsbăk, mŏs- 
    noun
  
 An old-fashioned or very conservative person.
 Webster's New World 
An old sluggish fish.
 American Heritage 
An old fish, shellfish, turtle, etc. with a greenish growth of algae, etc. over the back.
 Webster's New World 
Other Word Forms of Mossback
Noun
Singular:
 mossbackPlural:
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