A wheel rotated by the treading of persons or animals to give motion to machinery, to pump, or raise water, etc.; esp. a wheel turned by the…
| 单词 | θ214391 |
| 释义 | society > occupation and work > equipment > machine > parts of machines > wheel > [noun] > tread (4) tread-wheelc1573 A wheel rotated by the treading of persons or animals to give motion to machinery, to pump, or raise water, etc.; esp. a wheel turned by the… wheel1623 Various mechanical contrivances. = tread-wheel, n.; also, a treadmill. tympanum1889 Mechanics. A hollow wheel turned by two or more persons walking inside it, and communicating motion to a machine (Cent. Dict. 1891). activity wheel1929 = exercise wheel n. at exercise, n. additions. |
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