See also: décimètre and deci-metre

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Borrowed from French décimètre. By surface analysis, deci- +‎ metre.

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decimetre (plural decimetres)

  1. (metrology) An SI unit of length equal to 10−1 metres. Symbol: dm
    • 1956, C. van Duijn, Diseases of Fishes, page 149:
      If the aquarium is placed where it receives insufficient daylight, artificial lighting by means of ordinary incandescent lamps should be employed. For good plant growth 2 decalumens of luminous flux per square decimetre of water surface []

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