Definition of 'humpback'

Noun

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

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