Annulus



noun — Plural: Annuli
1.
រូបរាងដូចកង
ENGLISH MEANING
noun — Plural: Annuli
1.
A ring; a ringlike part or space.
2.
A space contained between the circumferences of two circles, one within the other.
3.
The solid formed by a circle revolving around a line which is the plane of the circle but does not cut it.
4.
Ring-shaped structures or markings, found in, or upon, various animals.