(noun) a small barb or pointed projection, especially one of the small projections fringing the edges of the barbs of feathers.
(noun) a thick bitter yellow or greenish fluid that is made by the liver that aids in the digestion and absorption of fats in the small intestine.
(noun) a "blood feather", sometimes called a "pin feather", is a developingfeather on a bird. This feather can grow as a new feather during the bird's infancy, or grow to replace one from moulting. The pin featherlooks somewhat like a feather shaft.
(noun) a kind of nonverbal communication, where thoughts, intentions, or feelings are expressed by physical behaviors, such as facial expressions, body posture, gestures, eye movement, touch and the use of space.