名詞 hump back:

1. an abnormal backward curve to the vertebral column
   同義詞：kyphosis, humpback, hunchback
2. a person whose back is hunched because of abnormal curvature of the upper spine
   同義詞：humpback, hunchback, crookback
3. large whalebone whale with long flippers noted for arching or humping its back as it dives
   同義詞：humpback, humpback whale, Megaptera novaeangliae