tumbling barrel
noun
a rotating drum for subjecting materials or small manufactured objects, loosely placed inside, to a tumbling action, as to mix materials or to polish objects by friction with one another or with an abrasive.
Origin of tumbling barrel
First recorded in 1885–90
Words nearby tumbling barrel
tumbler,
tumbler gear,
tumbler switch,
tumbleweed,
tumbling,
tumbling barrel,
tumbling box,
tumbrel,
tumefacient,
tumefaction,
tumefy