a co - agin
- a construction typical of modern suburban development
- a heavy type of gutter
- a high, defensive wall
- a large town house
- A level
- a small paving stone
- a square paving stone
- a type of quarry tile, usually hexagon-shaped
- a type of valve
- a type of Vee-gutter
- a wood gutter lined with metal
- A-frame
- A.C. generator
- abacus
- abbedo
- abbey
- abbey church
- abestos sheet
- above grade
- above-grade masonry
- above-grade structure
- above-grade wall
- above-grade walls
- above-grade work
- above-ground swimming pool
- abrasion
- abrasion resistance
- abrasion test
- abrasion testing machine
- abrasion text
- abrasive
- abrasive paper
- absolute specific gravity
- absorbed water
- absorbent
- absorber
- absorber panel
- absorbing plate
- absorbing surface
- absorbing well
