A distinguishing quality.

Identification mark on the ear of a domestic animal.

ETYM French, from Latin tractus, from trahere to draw. Related to Trace, Tract a region, Trace a strap, Tret.
A distinguishing feature of one's personal nature.

ETYM Greek: cf. French charactéristique.
Typical or distinctive.

ETYM Latin typicus, Greek, from typos type: cf. French typique. Related to Type.
1. Conforming to a type.
2. Exhibiting the qualities or characteristics that identify a group or kind or category.
Error is within plus or minus one standard deviation (±1%) of the nominal specified value, as computed from the total population.