velarium

vēlārium ī, n

velum.—In a theatre, an awning, screen (to protect spectators from the sun), Iu.

velarium
vēlārĭum, ii, n. [velum], a covering , screen , awning , stretched above the theatre to keep off t...

A New Latin Dictionary by Charlton T. Lewis Ph.D. and Charles Short, LL. D.
Velarium
·noun The marginal membrane of certain medusae belonging to the Discophora. ...

Webster's Dictionary of the English Language