Sideburns or sideboards are patches of facial hair grown on the sides of the face, extending from the hairline to below the ears and worn with an unbearded chin. The term sideburns is a 19th-century corruption of the original burnsides, named after American Civil War general Ambrose Burnside, a man known for his unusual facial hairstyle that connected thick sideburns by way of a moustache, but left the chin clean-shaven.

Realtree Camo Beard, Sideburns and Moustache Trimmer by Andis
The Flaming Sideburns - Hallelujah rock'n'rollah
Reduction Malarplasty Using an L-Shaped Osteotomy Through Intraoral and Sideburns Incisions
Preauricular and sideburns operating procedures for a natural look in facelifts
Transplanting temporal points, sideburns, and feminine hairlines
Facial hair restoration: hair transplantation to eyebrows, beard, sideburns, and eyelashes.
Distinct Trichoscopic Features of the Sideburns in Frontal Fibrosing Alopecia Compared to the Frontotemporal Scalp
Cervicofacial Flap: Can We Save Patient's Sideburns?
Chapter 6 - ‘Those girls with sideburns’: Enhancing the female body
[Andrew Child (1825-1884) with full sideburns.]