The term 'Sign of Life' can be represented by two crossword solutions, 'PULSE' (5 letters) and 'ANKH' (4 letters). PULSE is a rhythmic throbbing of the arteries that can be felt when pressure is applied to the skin, usually at the wrist or neck. It is an indicator of a person's health and is used to measure heart rate. ANKH is an ancient Egyptian symbol of life, often depicted as a cross with a loop at the top. It is believed to represent the concept of eternal life and is still used today as a symbol of life and immortality.