Lewis Short
tĕgŭlum (noun N) : tego
* A covering, roof, thatch (very rare): tegulo aquaticarum harundinum domos suas operiunt,Plin. 16, 36, 64, § 156: scirpi fragiles ad tegulum tegetesque,id. 16, 37, 70, § 178.
Charlton T. Lewis, Charles Short, A Latin Dictionary