Definition of "micrometre" []

• An SI/MKS unit of measure, the length of one one-millionth of a metre. Symbol: µm, um, rm (noun)

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• "Just as microelectronics exploits the behaviour of electrons in metals and semiconductors on micrometre scales, so nanoplasmonics is concerned with the nanoscale comings and goings of entities known as plasmons that lurk on and below the surfaces of metals… SPASERS!"
• "This is a bit belated, but you can do the symbol(s) for micrometre ( µm ) like this: &_micro_;m (omit the underscores)."
• "(I should have guessed actually, due to the bed being covered in a micrometre-thin layer of ancient bark chips, which together with decking seems to be our landlord's solution to anything remotely horticultural.)"