What is defined as prefabricated masonry units, such as concrete block or brick, that are joined together with mortar?

The term that describes prefabricated masonry units, such as concrete blocks or bricks, that are joined together with mortar is masonry itself. Masonry encompasses the construction and design techniques using these individual units to form walls, structures, or other types of architectural elements. It involves not just the material but the method of assembling those materials to create a strong, durable structure.

Concrete masonry units, while related, refer specifically to the types of blocks made from concrete rather than the broader category of masonry that includes all types of brick and stone. Joints are the spaces or gaps filled with mortar between the masonry units but do not encompass the units themselves. Bond refers to the pattern or method used to arrange the masonry units, which helps provide strength and stability to the overall structure, but again does not define the units themselves.

Thus, masonry is the most comprehensive and accurate term that encapsulates prefabricated units being joined with mortar.