chiroplast

Ancient Greek χείρ (kheír, “hand”) + πλάσσω (plássō, “to shape”)

• IPA^(key): /ˈkaɪɹəplæst/, /ˈkaɪɹəplɑːst/

chiroplast (plural chiroplasts)

1. (music, historical) A sliding wooden frame clamped above the keys of the piano, into which the hands and fingers of a pianist are placed. It was used for learners of the piano in the early 19th century.

• “chiroplast”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.
• Franklin Taylor (1900) “s:A Dictionary of Music and Musicians/Chiroplast”, in Dictionary of Music and Musicians

• lithocarps, philocrats, politarchs, strophical