water plate

water plate (plural water plates)

1. A plate heated by hot water contained in a double bottom or jacket.

• Edward H[enry] Knight (1877) “Water plate”, in Knight’s American Mechanical Dictionary. […], volumes III (REA–ZYM), New York, N.Y.: Hurd and Houghton […], →OCLC.
• “water plate”, in Webster’s Revised Unabridged Dictionary, Springfield, Mass.: G. & C. Merriam, 1913, →OCLC.