The Free On-line Dictionary of Computing (30 December 2018):

dynamic link

    A pointer from an activation record to the
   activation record for the scope from which the current
   scope was called at run time.  This is used in a statically
   scoped language to restore the environment pointer on exit
   from a scope.  To access a non-local variable in a
   dynamically scoped language, dynamic links are followed
   until a binding for the given variable name is found.

   (1995-03-07)