Trees' age indicators

• Ringlike parts
• Tree's age indicators
• Tree rings
• Rings
• To cancel, one rings
• Ring-shaped objects

WordNet Word definitions in WordNet
n. a toroidal shape; "a ring of ships in the harbor"; "a halo of smoke" [syn: ring , halo , anulus , doughnut , anchor ring ] (Fungi) remnant of the partial veil that in mature mushrooms surrounds the lower part of the stem [also: annuli (pl)]

Wiktionary Word definitions in Wiktionary
n. (en-irregular plural of: annulus )

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Annulus \An"nu*lus\, n.; pl. Annuli . [L.] A ring; a ringlike part or space. (Geom.) A space contained between the circumferences of two circles, one within the other. The solid formed by a circle revolving around a line which is the plane of the circle ...