scoria, slag, impurity, impureness, garbage, waste, trash.
Had I the ship filled with the dross,
I would give it all to bring a look of kindness into his eye.
But the Captain was an alchemist, and the dross
of outer events turned to gold in the marvellous crucible of his mind.
There darted through his racked mind the sorry jingle that Chilly had once roared in his rooms: Money is dross,
Loving is loss, There's never a crown that is worth its cross.