Echo location is a biological process used by some animals to locate objects or other animals. It involves the emission of sound waves and the reception of the reflected sound waves. The crossword solutions for echo location are CANYON (6 letters), CANON (5 letters), and RADAR (5 letters). CANYON is a deep, steep-sided valley formed by the erosive action of a river or stream. CANON is a set of rules or principles that are accepted as authoritative. RADAR is a system that uses radio waves to detect the range, altitude, direction, or speed of objects.