rooftree

Từ điển WordNet v3.1 - WordNet Dictionary

noun

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 (Freq. 1)
• Syn:
ridge, ridgepole
• Hypernyms:
beam
• Part Holonyms:
gable roof, saddle roof, saddleback, saddleback roof