- A measuring instrument that sends out an acoustic pulse in water and measures distances in terms of the time for the echo of the pulse to return; "sonar is an acronym for sound navigation ranging"; "asdic is an acronym for antisubmarine detection investigation committee"
- British term for sonar
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Definitions of: ACIDS
- Street name for lysergic acid diethylamide
- Any of various water-soluble compounds having a sour taste and capable of turning litmus red and reacting with a base to form a salt
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- (n.) A kind of coarse serge.