
1) Gothic architecture
Found on
https://www.crosswordclues.com/clue/rayonnant

In French Gothic architecture, Rayonnant (ʁɛjɔnɑ̃) was the period between c. 1240 and 1350, characterized by a shift in focus away from the High Gothic mode of utilizing great scale and spatial rationalism (such as with buildings like Chartres Cathedral or the nave of Amiens Cathedral) towards a greater concern for two dimensional surfaces an...
Found on
http://en.wikipedia.org/wiki/Rayonnant

• (a.) Darting forth rays, as the sun when it shines out.
Found on
http://thinkexist.com/dictionary/meaning/rayonnant/
Ray'on·nant (rā'ŏn*nănt)
adjective [ French]
(Her.) Darting forth rays, as the sun when it shines out.
Found on
http://www.encyclo.co.uk/webster/R/16

In heraldry, the term rayonnant, or rayonny (also spelled rayonne), means darting forth rays, as the sun when it shines out. The rays are usually of gold, silver or red, and representing light or flames. The term is also applied to a line of demarcation composed of a series of rays with wavy outline.
Found on
http://www.probertencyclopaedia.com/browse/UR.HTM
No exact match found.