[UNDER-1 5 c.]

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  1.  attrib. Having springs beneath.

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1837.  W. B. Adams, Carriages, 84. The simplest kind of four-wheeled spring vehicle for one horse is called an Underspring Phaeton.

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  2.  An underlying fountain.

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1851.  Mrs. Browning, Casa Guidi Wind., I. 956. I feel how nature’s ice-crusts keep the dint Of undersprings of silent Deity.

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