A thin membrane that separates the outer ear from the middle ear and transmits sound from the air to the malleus.
Any volution, as for example in the human ear or fingerprint.
A circle of three or more leaves, flowers, or other organs, about the same part or joint of a stem.
A flywheel, a weight attached to a spindle.
A volution, or turn, of the spire of a univalve shell.
Each circle, volution or equivalent in a pattern of concentric circles, ovals, arcs, or a spiral.
To form a pattern of concentric circles.