the Daumenregel is used (particularly in Southern Germany) as synonym for rule of thumb.

The following terms are occasionally falsely called Daumenregel:

  • With the thumb jump distances can be measured.
  • With the being right lp rule (in electro-technology) the direction of the magnetic field is determined around a leader as a function of the direction of the electric current. Thumbs of the right hand in direction of current parallel to the leader, then show the fingertips toward the magnetic lines of flux.

Wiktionary: Daumenregel - word origin, synonyms and translations
this side is a term clarifying for the distinction of several terms named the same word.

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