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Meaning of hydronic

hy•dron•ic

Pronunciation: (hī-dron'ik), [key]
— adj.
  1. of or pertaining to a heating system for a building in which the medium for carrying heat throughout the structure is circulating water, esp. when the circulation is aided by a pump.
Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease.