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单词 derivometer
释义 deriˈvometer|dɛrɪˈvɒmɪtə(r)|
[a. F. dérivomètre, f. dériver to drift (see derivation2) + -ometer.]
An instrument invented to show a ship's lee-way.
1842Mech. Mag. XXXVII. 84 Another invention of M. Clement's, which he calls a Derivometer, is an instrument to ascertain a ship's leeway..When at anchor, the instrument will show clearly the direction of the currents.1928Times 15 Aug. 13/6 The afterpart of the cabin..contained the derivometer for measuring the airship's deviation from the straight course.
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