A feather, wing, fin, or other similar appendage.
The visible part of the ear that resides outside of the head, the auricle; outer ear excluding the ear canal.
A leaflet or primary segment of a pinnate compound leaf.
The flattened, web-like part of a feather, consisting of a series of barbs on either side of the shaft.
Any of several usually relatively thin, rigid, flat, or sometimes curved surfaces radially mounted along an axis, as a blade in a turbine or a sail on a windmill, that is turned by or used to turn a fluid.
A sight on a sextant or compass.
One of the metal guidance or stabilizing fins attached to the tail of a bomb or other missile.
A weather vane.