from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Formed in a blackboard bold typeface, in which certain lines of the character are doubled
from The Century Dictionary and Cyclopedia
- In numismatics, showing a double impression of the device (type) or inscription, as a coin or medal, owing to the fact that the metal blank accidentally shifted while the specimen was being struck off from the die.
Sorry, no etymologies found.