chinstrap

Etymology

From chin + strap.

chinstrap means A strip of leather or material used to fasten a hat or helmet under the chin. Lexicurio rates it Sui generis — a strength score of 89 out of 100.

noun

A strip of leather or material used to fasten a hat or helmet under the chin.“A bridle, the chin-strap or chain.”
A form of beard that follows the jawline but does not cover the rest of the chin.
A band of colour below a bird's mouth, resembling the chinstrap of a helmet.“A miniature look-alike of the Canada Goose, with a partial white necklace instead of a white chinstrap.”