Mark under a consonant in French, perhaps

• A diacritical mark (,) placed below the letter c to indicate that it is pronounced as an s
• Janet's fiancГ© in "The Rocky Horror Picture Show"
• French "c" feature, maybe
• Facade feature
• Façade part
• Garçon's need
• Every garçon has one
• Every garГ§on has one
• Mark suggesting a 'c' should be pronounced an 's'

Wiktionary Word definitions in Wiktionary
n. (context orthography English) In the spelling of Catalan, French, Portuguese and some other languages, a mark sometimes placed under the letter (term: c) to indicate that it is pronounced /s/ rather than /k/, as in French ''menaçant'' and Portuguese ...