Micrometer (µm)
Definition: Micrometer (symbol: µm) na one millionth of meter (0.000001 m or 10^-6 m). Na metric unit wey dem dey use for very small distance.
History/origin: Micrometer become standard for science and engineering as microscopy, machining, and materials analysis develop. E replace older talk like micron, wey people still dey use informally sometimes.
Current use: Dem dey use micrometers for cell sizes, bacteria, dust particles, textile fibers, thin coatings, and manufacturing tolerances for engineering and precision machining.