tĕgŭlum — Lewis & Short
tĕgŭlum, i, n.tego,
I 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.