"Dongle", for those too chicken to Google, technically used to have proprietary purposes,and is now a term sort of improperly used for a cable that connects junk to your comp in any # of ports. The wire that connects yer camera or card reader etc.
Not all tissues are Kleenex, but we call em that anyway.
My last "Big" Trip, I forgot my cable and extra card for my card reader, so I was stuck with my cameras whimpy internal memory, and at the mercy of batteries to upload pictures. I got much grief from some folks for not posting VOLUMES of pics