rebecks

/R AH0 B EH1 K S/
noun
  1. 1

    An early three-stringed instrument, somewhat like a simple violin only pear shaped, played with a bow and used in Medieval and the early Renaissance eras.

Source: https://en.wiktionary.org/wiki/rebec, https://en.wiktionary.org/wiki/rebeck, https://en.wiktionary.org/wiki/rebecks