A pair of compasses (a device used to draw an arc or circle).
A magnetic or electronic device used to determine the cardinal directions (usually magnetic or true north).
The range of notes of a musical instrument or voice.
Moderate bounds, limits of truth; moderation; due limits; used with within.
To surround; to encircle; to environ; to stretch round.
To go about or round entirely; to traverse.
A sight on a sextant or compass.
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.
One of the metal guidance or stabilizing fins attached to the tail of a bomb or other missile.
The flattened, web-like part of a feather, consisting of a series of barbs on either side of the shaft.
A weather vane.