tommelfingerregel

== Danish == === Etymology === tommelfinger +‎ regel === Noun === tommelfingerregel rule of thumb (chiefly definite, physics) a mnemonic for determining the direction of the magnetic field brought about by a current ==== Declension ==== == Norwegian Bokmål == === Etymology === From tommelfinger +‎ regel. === Noun === tommelfingerregel m (definite singular tommelfingerregelen, indefinite plural tommelfingerregler, definite plural tommelfingerreglene) a rule of thumb === References === “tommelfingerregel” in The Bokmål Dictionary. == Norwegian Nynorsk == === Etymology === From tommelfinger +‎ regel. === Noun === tommelfingerregel m (definite singular tommelfingerregelen, indefinite plural tommelfingerreglar, definite plural tommelfingerreglane) a rule of thumb === References === “tommelfingerregel” in The Nynorsk Dictionary.