concertina Meaning, Definition & Usage
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noun coiled barbed wire used as an obstacle
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noun free-reed instrument played like an accordion by pushing its ends together to force air through the reeds
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verb collapse like a concertina
WordNet
Con`cer*ti"na noun
Etymology
From It.Definitions
A small musical imstrument on the principle of the accordion. It is a small elastic box, or bellows, having free reeds on the inside, and keys and handles on the outside of each of the two hexagonal heads.