The Collaborative International Dictionary of English v.0.48:
Rooftree \Roof"tree`\, n. The beam in the angle of a roof; hence, the roof itself. [1913 Webster] Now for me the woods may wither, now for me the rooftree fall. --Tennyson. [1913 Webster]WordNet (r) 3.0 (2006):
rooftree n 1: a beam laid along the edge where two sloping sides of a roof meet at the top; provides an attachment for the upper ends of rafters [syn: ridge, ridgepole, rooftree]