Characteristic
/ˌkæɹəktəˈɹɪstɪk/
noun
A distinguishing feature of a person or thing.
The integer part of a logarithm.
The distinguishing features of a navigational light on a lighthouse etc by which it can be identified (colour, pattern of flashes etc.).
Synonyms: attribute, hallmark, idiosyncrasy, mannerism, quality, tendency, trademark, trait
adjective
Being a distinguishing feature of a person or thing.
Synonyms: distinctive, exclusive, idiosyncratic, indicative, representative, signature, specific, typical