What does annulet mean?
The definition of annulet
An”nu*let, n.
Etym: [Dim. of annulus.]

1 A little ring. Tennyson.
2 (Arch.)
A small, flat fillet, encircling a column, etc., used by itself, or with other moldings. It is used, several times repeated, under the Doric capital.
3 (Her.)
A little circle borne as a charge.
4 (Zoöl.)
A narrow circle of some distinct color on a surface or round an organ.