hackle

An instrument with steel pins used to comb out flax or hemp.

(usually now in the plural) One of the long, narrow feathers on the neck of birds, most noticeable on the rooster.

(fishing) A feather used to make a fishing lure or a fishing lure incorporating a feather.

(usually now in the plural) By extension (because the hackles of a rooster are lifted when it is angry), the hair on the nape of the neck in dogs and other animals; also used figuratively for humans.

A type of jagged crack extending inwards from the broken surface of a fractured material.

A plate with rows of pointed needles used to blend or straighten hair.

A feather plume on some soldier's uniforms, especially the hat or helmet.

Any flimsy substance unspun, such as raw silk.