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Noun: micromillimetre
Usage: Brit, Cdn (US: micromillimeter)
  1. A metric unit of length equal to one billionth of a meter
    "The thickness of the coating was 50 micromillimetres";
    - nanometer [US], nanometre [Brit, Cdn], nm, millimicron [Brit], micromillimeter [US]

Derived forms: micromillimetres

Type of: metric linear unit

Part of: micrometer[2] [US], micrometre [Brit, Cdn], micron

Encyclopedia: Micromillimetre