also: まるシー
noun
copyright symbol; copyright sign
Refers specifically to the © symbol itself.
このページの一番下にマルＣが書いてある。
There is a copyright symbol at the very bottom of this page.
noun
Used metonymically to mean copyright itself, often in informal contexts.
この曲にはマルＣがかかっているから、勝手に使えない。
This song is under copyright, so you can't use it freely.
From the shape of the copyright symbol ©, which is a circle (マル) around the letter C.