preheater

noun

preheater

noun

Etymology From preheat + -er.

1

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

A Stone-Vapor "Watchman" oil-fired preheater raises the cooling water temperature to an optimum figure before the high-speed engine is started and thus minimises engine wear.1961 July, “The Hymek Type 3 diesel locomotive for the Western Region”, in Trains Illustrated, page 437:

Entry derived from the Wiktionary, under licence CC BY-SA 4.0 — list of authors.