The hyl, metric slug (mug), or TME (German: technische Masseneinheit, technical mass unit), is the mass that accelerates at 1 m/s² under a force of 1 kgf.[1]

The hyl has also been used as the unit of mass in a meter-gram force-second (mgfs) system.[2] This hyl is 10-3 as much as the above, more common, hyl.


  1. Measurements, Units of Measurement, Weights and Measures - Numericana
  2. Meter-kilogram-force-second systems of units

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