Englishfor English speakers
cleft
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noun
a split or indentation in something (as the palate or chin)
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adjective
having one or more incisions reaching nearly to the midrib
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noun
(= crack)
a long narrow opening
spine
Noun
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Your spine is the set of bones down the middle of your back.
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Spines are sharp, pointy parts on an animal or a plant.
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The spine of a book is the narrow, hard part that joins the pages together.