• Webster's Revised Unabridged Dictionary
    • n Chiroplast (Mus) An instrument to guid the hands and fingers of pupils in playing on the piano, etc.
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Century Dictionary and Cyclopedia
    • n chiroplast An apparatus invented by J. B. Logier in London, about 1810, for training the hands of beginners in pianoforte-playing. It consisted of complex arrangements to sustain and guide the wrist and the fingers. A simplification of the machine, invented by Kalkbrenner in 1818, is still in occasional use.
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Webster's Revised Unabridged Dictionary
Gr. formed by hand; chei`r hand + to shape