differentia

something that sets apart an individual from others of the same kind <a list of the chief differentiae between a controlling cult and a legitimate religious sect> Synonyms affection, attribute, attribution, character, criterion, diagnostic, characteristic, feature, fingerprint, hallmark, mark, marker, note, particularity, peculiarity, point, property, quality, specific, stamp, touch, traitRelated Words badge, indication, sign; emblem, symbol, token; charm, grace; excellence, merit, virtue; eccentricity, idiosyncrasy, oddity, quirk; individuality, singularity, uniqueness