From Wiktionary, the free dictionary
Ⓣ
- Indicates a phone number.
2009, Rough Guides, Terry Richardson, The Rough Guide to Istanbul (in English), Penguin, →ISBN, page 28:Car ferries, operated by IDO (İstanbul Deniz Otobüsleri; enquiries at Ⓣ0212 […] , Ⓦwww.ido […] )
2013, Emily Laurence Baker, Slow New Forest: Local, characterful guides to Britain's special places (in English), Bradt Travel Guides, →ISBN, page 109:④ New Forest Wildlife Park
Deerleap Lane, Ashurst SO41 4UH Ⓣ 023 […] Ⓦ www.newforestwildlifepark.co.uk
- (electricity) Temperature control switch.
- (phonetics) An unidentifiable or indeterminate tonicity (stress or tone).
- (chemistry, obsolete) Tin (Daltonian symbol).
See ○ and ◌⃝ for uses of a letter inside a circle.