A "Lab-on-a-Chip" is a miniaturized device that integrates multiple laboratory functions onto a single chip, often no larger than a credit card. It allows for the analysis of biological samples, chemical reactions, and other processes in a compact format. This technology can perform tasks like mixing, separating, and detecting substances, making it useful in fields such as biotechnology, medical diagnostics, and environmental monitoring. These chips utilize microfluidics, which involves the precise control of small volumes of fluids. By reducing the size of traditional laboratory equipment, Lab-on-a-Chip devices can provide faster results, require less sample material, and lower costs. They are increasingly used in point-of-care testing and personalized medicine.