We found one dictionary that defines the word ring of an arch:

Art (1 matching dictionary)

1. RING of an ARCH: The Britannia Lexicon (Middle Ages Glossary)

▸ Words similar to ring of an arch ▸ Usage examples for ring of an arch ▸ Idioms related to ring of an arch ▸ Wikipedia articles (New!) ▸ Words that often appear near ring of an arch ▸ Rhymes of ring of an arch ▸ Invented words related to ring of an arch