Webster
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Webster’s Revised Unabridged Dictionary · 1913

Heating

Heat′ing (hēt′ĭng), a. That heats or imparts heat; promoting warmth or heat; exciting action; stimulating; as, heating medicines or applications.

Heating surface (Steam Boilers), the aggregate surface exposed to fire or to the heated products of combustion, esp. of all the plates or sheets that are exposed to water on their opposite surfaces; — called also fire surface.

Webster’s Revised Unabridged Dictionary, Noah Porter, editor (Springfield, Mass.: G. & C. Merriam, 1913). Public domain. Text as transcribed by MICRA, Inc., from Project Gutenberg. Changed for Deep Dive Bible: Greek, which our source spelled in Latin letters, set in Greek letters; entries of one spelling merged into one article; Greek words our source left out (shown as “?”), read from the 1898 printing, from the same plates (the Library of Congress’s copy), where the place could be found with certainty.