From Longman Dictionary of Contemporary Englishhumpbackhump‧back /ˈhʌmpbæk/ noun [countable] 1 a humpback whale2 MIa hunchback
Examples from the Corpus
humpback• 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. 