You know what it looks like… but what is it called?
TAKE THE QUIZ“incourse”
The following 2 entries include the term incourse.
block-in-course
noun: squared stone masonry with good close joints to give great strength and soundness
block-in-course bond
noun: a bond used in brick arches in which the arch is divided into sections similar in shape to the voussoirs of stone arches with the brick in each section laid with any desired bond but with the radial joints between sections continuous from intrados to extrados
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Merriam-Webster unabridged