Definition of mace:

part of speech: noun

A spice; the aril or second coat of the nutmeg.

part of speech: noun

The insignia of authority in the form of a club, and generally surmounted by a crown, borne before high officials, as mayors, lord provosts, the Speaker of the House of Commons, the Lord Chancellor, & c.; anciently, a weapon of war in the form of a club; the heavy rod used at billiards.