Characteristic /(?)/

Char·ac·ter·is·tic

Characteristic

a.
  1. Pertaining to, or serving to constitute, the character; showing the character, or distinctive qualities or traits, of a person or thing; peculiar; distinctive.
    Characteristic clearness of temper.

Characteristic

n.
  1. A distinguishing trait, quality, or property; an element of character; that which characterized.
    The characteristics of a true critic.
  2. The integral part (whether positive or negative) of a logarithm. (Math.)