a type of early pipe organ in which water is used to regulate and maintain air pressure; = hydraulus, n.
| 单词 | θ227129 | 
| 释义 | society > leisure > the arts > music > musical instrument > keyboard instrument > types of organ > 			[noun]		 > water-organ (4)		 water organa1387 a type of early pipe organ in which water is used to regulate and maintain air pressure; = hydraulus, n. hydraulicon1570 = hydraulic organ n. at hydraulic, adj. n.special uses. hydraulic1626 A hydraulic organ: see A. 2. Obsolete. hydraulus1874 A type of water organ popular in classical times; = hydraulic organ n. at hydraulic, adj. n.special uses. | 
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