kilderkin noun2 •A small barrel. •An old English liquid measure, usually being half a barrel; containing 18 English beer gallons, or 83.178 L.Barrels came in firkins, nine gallons; kilderkins, eighteen gallons; halves, twenty-seven gallons; barrels, thirty-six gallons and hogsheads, fifty-four. — 1987 formskilderkins
