1.1 This terminology contains terms, definitions of terms, nomenclature, and explanations of abbreviations, acronyms, and symbols specific to concrete masonry units and related units.

1.2 The definitions and descriptions of terms in this terminology pertain to Specifications C55, C73, C90, C129, C139, C744, and C1319 and Test Methods C140, C426, C1006, and C1262.