mainpiece

Etymology
From.

Noun

 * 1)  The primary play or other work performed at an evening's entertainment at the theatre, as opposed to smaller introductory or additional works.
 * 2)  The principal part of a ship's head; the principal piece of timber in a rudder.
 * 1)  The principal part of a ship's head; the principal piece of timber in a rudder.
 * 1)  The principal part of a ship's head; the principal piece of timber in a rudder.