pompholyx
From LSJ
τοῦ δὲ πολέμου οἱ καιροὶ οὐ μενετοί → in war, opportunities won't wait | the chances of war will not wait (Thucydides 1.142.2)
pomphŏlyx: ygis, f., = πομφόλυξ,
I a substance deposited from the smoke of smelting-furnaces, pompholyx, Plin. 34, 13, 33, § 128.