D defs.my
Entry 1 sense Webster, 1913

Concertina

/kän-sẽrt-ēn'-ə/ · Con·cer·ti·na · IPA /ˌkɑnsɚˈtinə/
01 n. 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 k…
  1. 1.
    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.