noun
cedilla
A diacritical mark (¸) placed under a letter, especially 'c' in French (ç), indicating a soft pronunciation. Used in linguistic and orthographic contexts.
from French cédille
フランス語では、cの下にセディーユを付けると「ス」のように発音する。
In French, when you put a cedilla under a c, it is pronounced like 's'.