a chamber containing the air supply for the reeds or pipes of an organ.
Origin of windchest
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
a box in an organ in which air from the bellows is stored under pressure before being supplied to the pipes or reeds
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012