◎
◎ - Translingual
Symbol
◎
- (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.
◎ - Japanese
Symbol
◎ • (nijūmaru)
- very good (better than ○)
- (maps) city hall or other municipal building
- This use may be formatted with a heavy outer ring: