, usually carved. _Crocket_--an
ornament usually resembling a leaf half opened, and projecting from the
upper edge of a canopy or pyramidal covering. The term is supposed to be
derived from the resemblance to a shepherd's crook. _Crypt_--a vault
beneath a church, generally beneath the chancel only, and sometimes used
for the exhibition of relics. _Cusp_--an ornament used in the tracery of
windows, screens, etc., to form foliation. _Dormer_--an upright window
placed on a sloping roof, giving light to the chambers next the roof.
_Fillet_--a small square band used on the face of mouldings.
_Finial_--the ornament which finishes the top of a pinnacle, a canopy,
or a spire, usually carved into a bunch of foliage. _Flying
buttress_--an arch carried over the roof of an aisle from the external
buttress to the wall of the clerestory, to support the vault.
_Gargoyle_--a projected water-spout, often ornamented with grotesque
figures. _Jambs_--the sides of a window opening or doorway.
_Mullion_--the vertical bar dividing the lights of a window. _Ogee_--a
moulding formed by the combination of a round and hollow. _Pier
arches_--the main arches of the nave or choir resting on piers.
_Pinnacle_--a sort of small spire usually terminating a buttress.
_Piscina_--a water-drain in a church placed on the right-hand side of an
altar for the use of the priest. _Plinth_--the projecting member forming
the lower part of a base or of a wall. _Shaft_--a small, slender pillar
usually attached to a larger one, or in the sides of a doorway or
window. _Slype_--a passage leading from the transept to the
chapter-house. _String-course_--a horizontal moulding or course of
masonry, usually applied to the one carried under the windows of the
chancel, both externally and internally. _Tooth ornament_--an ornament
resembling a row of teeth, sometimes called dog's tooth and shark's
tooth. _Transept_--the portion of a building crossing the nave and
producing a cruciform plan. _Transition_--the period of a change of
style, during which there is frequently an overlapping of the styles.
_Transom_--the transverse horizontal piece across the mullions of a
window. _Triforium_ or blind story--the middle story of a large church,
over the pier arches and under the clerestory windows; it is usually
ornamented by an arcade, and fills the space formed by the necessary
slope of the aisle roofs. _Tympanum_--the space between the flat lintel
of a doorway and the arch over it, usu