washout

Definition

An act of washing or cleaning the inside of something.

Etymology

Deverbal from wash out.

Example Sentences

• "No. 21C9 was in need of a boiler washout and though she was carefully and assiduously fired and use made of the fire-irons during the run, it was not possible to maintain steam, which often fell as low as 210 lb."
• "In recent months, as we have already reported, boiler washouts of Stratford's "Britannia" Pacifics have been carried out at Norwich, owing to the better staff situation at the latter shed, […]"
• "The cistern was fitted with washouts and air-valves."