[UNDER-1 5 c.]
1. attrib. Having springs beneath.
1837. W. B. Adams, Carriages, 84. The simplest kind of four-wheeled spring vehicle for one horse is called an Underspring Phaeton.
2. An underlying fountain.
1851. Mrs. Browning, Casa Guidi Wind., I. 956. I feel how natures ice-crusts keep the dint Of undersprings of silent Deity.