abside Same as apse.

absidiole Same as apsidiole.

absolute humidity The mass of water vapor per unit volume of air.

absolute pressure The sum of the gauge pressure plus atmospheric pressure.

absolute volume 1. Of a granular material, the total volume of the particles, including the permeable and impermeable voids, but excluding the spaces between the particles. 2. Of fluid, the volume which the fluid occupies. 3. The displacement volume of an ingredient of concrete or mortar. Read more...

abat-voix In a church, a sound reflector behind and over a pulpit.

abbey A monastery or convent; particularly the church thereof.

abbreuvoir Same as abreuvoir.

ABC 1. Abbr. for “aggregate base course.” 2. Abbr. for “Associated Builders and Contractors.”

A-block A hollow, concrete masonry unit with one end closed and the opposite end open, having a web between, so that two cells are formed when the block is laid in a wall.Read more...

? Abbr. for angstrom.

A 1.Abbr. for ampere, a unit of electric current. 2.Abbr. for area.

AA Abbr. for the “Architectural Association,” the largest school of architecture in England; address 34–36 Bedford Square, London, WC1B 3ES.

AAA Abbr. for “Architectural Aluminum Association.”

AAI Abbr. for “Architectural Association of Ireland.”Read more...