velarium
Concise Oxford English Dictionary © 2008 Oxford University Press:
velarium /vɪˈlɛːrɪəm/
▶noun (pl. velaria /-rɪə/)
- 1 a large awning used in ancient Rome to shelter an amphitheatre.
- 2 an inner ceiling used to improve acoustics in a theatre.
– origin from L.
'velarium' also found in these Oxford entries:

