This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. An engineering device that preheats a material prior to some other process.

n. A chamber or cylinder in which a substance is heated before being used or operated upon.

"The absorber surface on the bottom of the preheater should be a dark color, and preferrably made of metal."

natural-draft    masticatory    semilunar    eduction    hydrophobicity