⊚

See also: Appendix:Variations of "="

⊚	U+229A, ⊚ CIRCLED RING OPERATOR

Translingual

Circled ring.

⊚

(mathematics) This term needs a definition. Please help out and add a definition, then remove the text {{rfdef}}.
(chemistry, obsolete) calcium ("lime", Daltonian symbol)
Technically, this should be red: ⊚. May also be typeset ⦾ or ◎, depending on which character matches the size of the other elements.