
1) Glass architecture
Found on
https://www.crosswordclues.com/clue/rose-window

A rose window (or Catherine window) is often used as a generic term applied to a circular window, but is especially used for those found in churches of the Gothic architectural style and being divided into segments by stone mullions and tracery. The name `rose window” was not used before the 17th century and according to the Oxford English Dic.....
Found on
http://en.wikipedia.org/wiki/Rose_window

Arguably one of the finest developments in the history of Western art. Evolving from the simple round windows of the Romanesque period these intricate works of glass, metal and stone literally flowered into holistic representations of the known Universe. While glass windows were used in cathedrals of other countries, the Rose Window was initially a...
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http://www.artisansofthevalley.com/comm_gloss3.html

Evolving from the simple round windows of the Romanesque period these intricate works of glass, metal and stone literally flowered into holistic representations of the known Universe. While glass windows were used in cathedrals of other countries, the Rose Window was initially a French creation, first appearing at St. Denis.
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http://www.artisansofthevalley.com/comm_gloss3.html

in Gothic architecture, decorated circular window, often glazed with stained glass. Scattered examples of decorated circular windows existed in the ... [1 related articles]
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http://www.britannica.com/eb/a-z/r/67

In Gothic architecture, a circular window frequently placed over one of the large doors. It is usually filled with elaborate tracery on a centralized pattern, in early examples arranged like the...
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http://www.encyclo.co.uk/local/20688

A circular window with divisions radiating from the centre. In Scotland commonly a feature associated with United Presbyterian churches. See also wheel window. Related Words: Wheel window
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http://www.encyclo.co.uk/local/20938

A circular window composed of patterned tracery arranged in petal-like formation.
Found on
http://www.pitt.edu/~medart/menuglossary/INDEX.HTM

In architecture, a rose window or catherine wheel window, is a type of window, chiefly found in Gothic buildings, circular in form, with the interior filled in with tracery work, the main parts of which often radiate like the spokes of a wheel.
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http://www.probertencyclopaedia.com/browse/TR.HTM

A circular stone window fitted with carved tracery.
Found on
http://www.selectstone.com/architectural-resources/stone-glossary/

Large round window found in cathedrals and churches in Europe from the 12th century ad onwards.
Found on
http://www.translationdirectory.com/glossaries/glossary336.php

[
n] - circular window filled with tracery
Found on
http://www.webdictionary.co.uk/definition.php?query=rose%20window

A circular window with radiating mullions.
Found on
http://www.woodworkersuk.co.uk/blog/carpentry-and-joinery-glossary/carpentr

Circular window with radiating tracery resembling spokes in a wheel.
Found on
https://www.encyclo.co.uk/local/20434
noun circular window filled with tracery
Found on
https://www.encyclo.co.uk/local/20974

A circular stone window fitted with carved tracery.
Found on
https://www.encyclo.co.uk/local/22191

A large round window on the west façade or transept, containing tracery that became more elaborate as the Gothic era progressed (fig.2, C). Beautiful examples occur at Notre-Dame in Paris and Chartres.
Found on
https://www.encyclo.co.uk/local/22199
No exact match found.