the.com/sigil

means A sigil is a symbol or small graphic design believed to carry magical power or to represent a person, group, or intention.

from From Latin 'sigillum,' meaning a little seal or image stamped on wax — itself a diminutive of 'signum,' meaning sign. The word passed into English through medieval and Renaissance occult texts, where 'sigillum' hardened into 'sigil' as the term for the strange, angular signatures of spirits and planetary powers found in grimoires. Some writers have fancied a link to Hebrew 'segulah' (a word for a charm or treasured thing), but that connection is folklore, not philology — the documented root is simply Latin's little seal.