arco de herradura: horse-shoe arch

arch - [ Traduzca esta página ]
arch 1: 1 round: imp impost, sp springer, v voussoir, k keystone, ext extrados,
int intrados; 2 horseshoe; 3 lancet; 4 ogee; 5 trefoil; 6 basket-handle; 7 ...
www.m-w.com/mw/art/arch.htm

http://www.pitt.edu/~medart/menuglossary/archtable.htm Glossary of Medieval Art and Architecture
horseshoe arch: a curved arch often used in Spanish medieval architecture. Its maximum width is greater than the distance between its two side supports. Many scholars believe that its widespread adoption there was influenced by the architecture of Muslim Spain.

AROCHE: CASTLE - [ Traduzca esta página ]
... inner arch and one outer arch, with a "horseshoe pointed arch joint with a pointed
barrel vault with an "Alfiz" (rectangle where the arch is inscribed)" which ...
www.arrakis.es/~mfructos/aroche/castle.htm

DRAE
alfiz. (Quizá del ár. hisp. *alhòíz, este de alhòáyyiz, y este del ár. clás. hòayyiz).
1. m. Recuadro del arco árabe, que envuelve las albanegas y arranca, bien desde las impostas, bien desde el suelo.

(esto explica el uso de "within")

Untitled Document - [ Traduzca esta página ]
... by stepped merlons. The interior facade shows a "horseshoe-shaped arch within an alfiz
or rectilinear frame" crowned by miniature stepped merlons in relief. The ...
gallery.sjsu.edu/IslamicTutorial/Cordoba/cordoba.html

AROCHE: CASTLE - [ Traduzca esta página ]
... inner arch and one outer arch, with a horseshoe pointed arch joint with a pointed
barrel vault with an "Alfiz" (rectangle where the arch is inscribed) which ...
www.arrakis.es/~mfructos/aroche/castle.htm

arquivolta. (Del it. archivolta).
1. f. Arq. Conjunto de molduras que decoran un arco en su paramento exterior vertical, acompañando a la curva en toda su extensión y terminando en las impostas.
archivolt [akvult]
n. Architect.
1. a moulding around an arch, sometimes decorated.
2. the under surface of an arch.
[from Italian archivolto; see {arc}, vault1]

(esto también justifica el "within")