OpenMedSpel for Mozilla Thunderbird

OpenMedSpel for Mozilla Thunderbird is free and open source software released under a GPL license.

OpenMedSpel includes nearly 50,000 medical terms ranging from abdominis to
zygomatic, which allows you to concentrate on your work instead of looking up words in a medical dictionary that are not in the built-in Mozilla Thunderbird spelling dictionary.


OpenMedSpel works for Mozilla Thunderbird 1.5 or higher.

OpenMedSpel for Thunderbird can be found at AddOns.Mozilla.org

Get Thunderbird email client

Installation Instructions


  • Save this dictionary file locally on your hard drive. Under Tools->Extensions, press the Install button and then select the file you saved.  
  • After successful installation, OpenMedSpel will appear in the list of available dictionaries in the spell checker dialog.