dabbrev-search-these-buffers-only
dabbrev-search-these-buffers-only is a variable defined in `dabbrev.el
'.
Its value is nilDocumentation: If non-nil, a list of buffers which dabbrev should search. If this variable is non-nil, dabbrev will only look in these buffers. It will not even look in the current buffer if it is not a member of this list. You can customize this variable.