This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
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noun-plural. 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.

n. Facial hair reaching from the top of the head down the side of the face to the side of the chin.

"The Union army general's famous facial hairstyle led to the term sideburns and I hear Huston is trying to grow his own for the part."

beard    moustache    mustache