'Raking course' definitions:

Definition of 'Raking course'

From: GCIDE

Rake \Rake\, v. i. To incline from a perpendicular direction; as, a mast rakes aft. [1913 Webster]
Raking course (Bricklaying), a course of bricks laid diagonally between the face courses in a thick wall, to strengthen it. [1913 Webster]