sigil

A seal; a signet.

A sign or an image considered magical.

A seal; an abbreviated sign or signature; also, an occult stamp, mark, or sign, as in magic or astrology. See signature, 2.

A seal; a signature.

A seal, signature or signet.

A sign, image or symbol considered to be magical.

A nonalphanumeric character affixed to a symbol (e.g. variable) to indicate a property such as type or scope.