Definitions for "Concertina"
A small musical instrument 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.
('con·ser·'tee·nuh). A hexagonel-shaped, free-reed, bellows instrument played with keys (buttons) on both ends.
free-reed instrument played like an accordion by pushing its ends together to force air through the reeds
Keywords:  concerto, grosso, baroque, solo, group
The solo group in a Baroque concerto grosso.
Keywords:  barbed, obstacle, coiled, wire
coiled barbed wire used as an obstacle
Keywords:  collapse
collapse like a concertina
Keywords:  condenser, microphone, pitch
Concert Pitch Condenser Microphone