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entasis =
The intentional slight
curving of the vertical
profile of a tapered col-
umn used to overcome
the optical illusion of
concavity that character-
izes straight sided col-
umns.
épi =
The spire-shaped termination of
a projecting point or angle of a
roof.
equilateral arch =
A two-centered arch in which
the chords of the curves just
equal the span of the arch.
escutcheon =
A protective plate surrounding
the keyhole of a door, a light
switch, etc. also called
scutch-
eon.
exedra =
A large niche or re-
cess, usually with a
bench or seats in a
church.
entasis
épi
equilateral arch
escutcheon
exedra