A water-bearing formation of gravel, permeable rock, or sand that is capable of providing water, in usable quantities, to springs

On drawings, abbr. for architectural projected window

Descriptive of a classical temple or similar building that has no columns along the sides but may have a portico

The semicircular termination of any rectangular chamber; an apse.

Pertaining to an apse or similar to one.

A chapel opening from an apse; such a radial chapel is a conspicuous feature of French Gothic architecture.

An aisle or ambulatory extending around an apse or chevet.