Definition of dragon's teeth in English:

dragon's teeth

plural noun

British
informal
  • Concrete obstacles pointing upwards from the ground in rows, used against tanks in the Second World War.

    • ‘When I was told to attack the Siegfried Line, I was given a 1: 100K map and three aerial photos of the pillboxes and dragon's teeth complex in my assigned sector and told to be ready at 4 A.M. but not to move until ordered.’
    • ‘Chairman Paul Melhuish said: ‘We looked at the possibility of fitting dragon's teeth or a barrier that horses and pedestrians could easily step over but would prevent other traffic from using it.’’

Phrases

  • sow (or plant) dragon's teeth

    • informal Take action that is intended to prevent trouble, but which actually brings it about.

      • ‘The Treaty of Versailles sowed dragon's teeth, generations of enmity.’
      • ‘And while it is currently less gory than the one perpetrated by suicide bombers, it is sowing dragon's teeth for the future.’
      • ‘He comments that while the biologists are ‘interested primarily in truth as such… they can hardly be quite uninterested in what will happen when they throw down their dragon's teeth into the world.’’
      • ‘He told them that they should yoke two of his fire-breathing bulls and sow dragon's teeth into the ground.’
      • ‘The protection money paid by the family and the support for the catechism of hate that has been a fundamental part of the polity for 50 years is yielding a harvest for those who sewed the dragon's teeth.’
      • ‘Punishing families and blowing up houses will only sow dragon's teeth.’
      • ‘Beyond nuclear weapons and missiles, North Korea is busy sowing other dragon's teeth with friends.’

Origin

With allusion to the teeth of the dragon killed by Cadmus.