0 the hairs on the back of some animals, or the feathers on the back of the neck of some birds, that rise when the animal or bird is frightened or about to fight -- （某些动物、鸟受惊吓或临战时会竖起的）颈背部毛，颈羽
If the hairs on the back of the moose's neck and shoulders (hackles) stand up, a charge is usually imminent.
The adult male has a more prominent crest than the female and also has longer neck hackles.
The head is grey, like the upper neck plumage, which turns into green and copper hackles towards the breast.
Raptors are shown as being covered in scales with a small crest of protofeathers that can be raised up like hackles when attacking.
Additional items that reflect a regiment's historical accomplishments, such as backing cloth and hackles, may be worn behind the cap badge.
He really got my hackles up.
Indeed, it raises hackles unnecessarily.
He managed to make some good suggestions without raising any political hackles on my part.
