An extra arm or leg is read as taking on more than one body can carry — or as a new capacity growing. Dream books link it to overload or to sudden resourcefulness.
Does the traditional reading fit your dream, or did it mean something else to you?
My Cosmic Code has a private dream journal. Write a dream down and the app picks out the symbols in it, shows what dream books say about them and, over time, which words recur across your entries. The journal is stored on your device only.