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单词 θ191799
释义
society > communication > indication > signalling > audible signalling > signalling with other sounding instruments > [noun] > sounding of whistle > types of whistle used as signal (5)
steam-whistle1840

A powerful whistle worked by a jet of steam (usually from a steam-boiler): used as a signal.

air whistle1853

a whistle operated by the force of compressed air; cf. steam-whistle, n.

police whistle1872

a type of loud whistle used by the police.

bull1884

? dialect. See quot. 1884.

Subcategories:

— sounding of steam-whistle (1)
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