Poetry and Rhymes

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

More Questions from Poetry and Rhymes
In the nursery rhyme "Rub-a-dub-dub", who, besides the candlestick maker, was in the tub?
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In the rhyme "Hey Diddle Diddle", who runs away with the spoon?
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Whose poem is titled "Alone and Drinking Under the Moon"?
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Eeny, meeny, miny, moe, what do you catch by a toe?
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In "Old Mother Hubbard", what happened when she came back from the baker?
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Whom can one see at Banbury Cross ?
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In "Mary, Mary, Quite Contrary", what silver things did Mary grow in her garden?
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Who won the prestigious TS Eliot prize for her first collection "Three Poems"?
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