humpback
From Longman Dictionary of Contemporary EnglishRelated topics: Illness & disabilityhumpbackhump‧back /ˈhʌmpbæk/ noun [countable] 1 a humpback whale2 MIa hunchbackExamples from the Corpushumpback• A little way along the lane is a humpback bridge that crosses a stream.• The numbers of humpback and fin whales had undergone similar increases.• Ken Bradshaw and I were singing songs to one another like a pair of humpback whales.• Roads with unexpected humpback bridges, tightening-radius corners and reasonably free of police and radar traps.