a jacket containing steam that surrounds and heats a cylinder
steam jacket in American English
noun
a casing, as on the cylinder of a steam engine, filled with live steam to keep the interior hot
Derived forms
steam-jacketed
adjective
Word origin
[1830–40]This word is first recorded in the period 1830–40. Other words that entered Englishat around the same time include: ante, nationalism, rococo, showcase, walkover