Characteristic

Part of speech: noun (n.)

1. A distinguishing trait, quality, or property; an element of character; that which characterized. Pope. The characteristics of a true critic. Johnson.

2. The integral part (whether positive or negative) of a logarithm.

Part of speech: adjective (a.)

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. Macaulay.