A hydrate which contains onehalf molecule of water to one molecule of the compound; the most common such material is partially dehydrated gypsum (plaster of paris).
The half channel on each of the two sides of a triglyph.
A semicircular alcove, sufficiently large to provide seating for a group of people.
1. A semicircular arena. 2. A room or division of a room in the form of a semicircle. 3. A semicircular recess.
The projecting spiral of a volute of an Ionic capital.
The handle of an ax, adz, hatchet, etc.
Characteristic of the style of Greek art after the death of Alexander in 323 B.C.
Pertaining to the classical Greek period, roughly from 480 B.C. to the death of Alexander in 323 B.C.
Same as spiral stair.
A facility where helicopters land, take off, and are maintained or repaired.