micrometres

Millionths of meters

Micrometres is the plural of micrometre, a unit of length equal to one millionth of a metre.

The micrometre is standard for measuring very small things—bacteria, wavelengths of light, the diameter of a human hair (about 70 micrometres).

Also spelled micrometers, particularly in American English.

The abbreviation is μm.

measurement

micron

Millionth of a meter

picometres · calibration · precision · accuracy · resolution · tolerance · gauge · metrology · instrumentation · specification

microscopy

magnification

Degree of visual enlargement

lens · imaging · micrograph · stain · slide · focus · fluorescence · optical · contrast · illumination

thickness

film

Movie or coating

foil · substrate · plating · laminate · veneer · shim · sheet · cladding · skin · deposition

fabrication

semiconductors

Partially conductive materials

MEMS · cleanroom · silicon · transistors · integrated circuits · lithography · sputtering · nanofabrication · microelectronics · wafer

particles

dust

Fine settled particles

  • pollenFloral reproductive grains
  • bacteriaNucleus-free single-celled organisms
  • sporesAsexual reproductive bodies

droplets · aerosols · fibres · particulates · filtration · airborne · contaminants · PM2.5 · allergens · sediment

Opposites
scale of measurement

micrometreslight-years

Units of astronomical distance

parsecs · astronomical units · kilometres · miles · metres

Family

micrometre

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