| 释义 |
ˈundershot, (ppl.) a. (and n.)
[under-1 4 a.]
1. Driven by water passing under.
undershot wheel, a water-wheel turned by force of water acting on the lower part of the wheel. undershot mill, a mill worked by an undershot wheel.
1610R. Vaughan Water-Workes P 3, To plant an vnder⁓shot-mil vpon a Riuer. 1660R. D'Acres Art Water-drawing 28 The close bucketted wheels..are of three sorts, the close bucketted under-shot, which receive their charge below [etc.]. 1759Phil. Trans. LI. 125 The undershot-wheel was taken off the axis, and..an overshot wheel..was put into its place. 1805Brewster Ferguson's Lect. I. 81 Water mills are divided into breast mills, undershot mills, and overshot mills. 1872H. W. Beecher Lect. Preaching viii. 149 If you have a great, full strong stream,.. then the wheel is made under-shot.
b. n. An undershot wheel or mill.
1705S. Carpenter Let. in Penn & Logan Corr. (1870) I. 233 After it has passed through the saw-mill it comes to the corn-mill, an undershot, and grinds very well. 1759Phil. Trans. LI. 137 All those that receive the impulse or shock of the water, whether in an horizontal, perpendicular, or oblique direction, are to be considered as undershots.
2. Having the lower jaw or teeth projecting beyond the upper; underhung.
1881V. Shaw Bk. Dog 39 Undershot, the lower incisor teeth projecting beyond the upper, as in Bulldogs. 1884Live Stock Jrnl. Aug. 130 The second prize-winner is leggy, with straight shoulders, not good face, and is undershot. |