– Definition: The millimeter, represented as “mm,” is a unit of length equal to one thousandth of a meter or one tenth of a centimeter. It is commonly used for precise measurements in engineering, manufacturing, and scientific research.

– History/Origin: The millimeter is a product of the metric system, introduced during the French Revolution. It is derived from the Latin word “mille,” meaning “thousand,” and the Greek word “metron,” meaning “measure.”

– Current Uses: Millimeters play a crucial role in fields requiring high precision such as machining, 3D printing, microelectronics, and medical diagnostics. They provide a fine-grained measurement scale for intricate components.

– Where to Use: Millimeters are employed in manufacturing processes, quality control, architectural drafting, and laboratory experiments where accuracy is paramount.