from The American Heritage® Dictionary of the English Language, 4th Edition
- n.pl. Growths of hair down the sides of a man's face in front of the ears, especially when worn with the rest of the beard shaved off.
from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. Facial hair reaching from the top of the head down the side of the face to the side of the chin.
Alteration of burnsides.(American Heritage® Dictionary of the English Language, Fourth Edition)
After Ambrose Burnside (1824–1881). (Wiktionary)