characteristic

A prominent attribute or aspect of something.

“generosity is one of his best characteristics”

Any measurable property of a device measured under closely specified conditions.

A distinguishing quality.

The integer part (positive or negative) of the representation of a logarithm; in the expression log 643 = 2.808 the characteristic is 2.

Typical or distinctive.

“heard my friend's characteristic laugh”

“red and gold are the characteristic colors of autumn”