Poetry and Rhymes

What literary term can be defined as the basic unit of a line of poetry?

More Questions from Poetry and Rhymes
Which American poet wrote "Paul Revere's Ride" and "The Song of Hiawatha"?
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From what work did Poe take the line "Whose heart-strings are a lute", used in his poem "Israfel"?
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In the rhyme "Wee Willy Winkie", what does Willy wear when he runs through town?
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Who had only 4 out of 900 poems published while alive?
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In "Hey Diddle Diddle", what jumped over the moon?
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What writer was once fired from a newspaper job because of a poem?
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Who wrote the poem "A Blue Valentine"?
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What words start Lewis Carroll's "Jabberwocky"?
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