A solid concrete masonry unit made from portland cement and suitable aggregates, with or without the inclusion of other materials.

A concrete masonry unit, sized and often colored and textured to simulate clay brick.

A solid concrete masonry unit (CMU) made from portland cement, water and aggregates.

A concrete hollow or solid unit smaller in size than a concrete block.

Portland cement and aggregates like sand or cinders mixed into brick-sized, solid masonry blocks.