The term 'blazed trails' refers to a phrase used to describe someone who has been a pioneer in their field. The term is often used to describe a person who has made a significant contribution to their field, and has set a new standard for others to follow. The crossword solution for this term is LED, which stands for Light Emitting Diode. LEDs are small electronic devices that emit light when an electrical current is applied to them. LEDs have been used in many applications, from lighting to communications, and have revolutionized the way we use technology.