Proper noun
Dieffenbach (plural Dieffenbachs or Dieffenbaches)
A surname from German.
In 1845, Johann Friedrich Dieffenbach wrote a comprehensive text on rhinoplasty, entitled Operative Chirurgie, and introduced the concept of reoperation to improve the cosmetic appearance of the reconstructed nose. Source: Internet
That’s how I got the bug to scratchbuild (modeling to scale),” Dieffenbach said. Source: Internet