Petty

a.
  1. Little; trifling; inconsiderable; also, inferior; subordinate; as, a petty fault; a petty prince.
    2. Petty averages .
    See under Average.
    Petty cash ,
    money expended or received in small items or amounts.
    Petty officer ,
    a subofficer in the navy, as a gunner, etc., corresponding to a noncommissionned officer in the army.