1. A dry stone wall. 2. A long low dam. 3. A bank of earth from an excavation . 4. […]

A member having two vertical channels or grooves, without the two lateral half grooves which characterize the triglyph.

On a clad sheet, a surface streak which results from the diffusion of alloying constituents into the coating from the

A glass lens used to widen the distribution of light from a source so as to increase its diffusion.

A reflecting surface which scatters incident light or sound in all directions.

A translucent material, such as that covering the lamps in a luminaire, used to distribute light over an extended area