出典:Wiktionary
From Middle English lamp oyl, lampehoyle, lamp oyle, lampe oyl, lampe oyle, equivalent to lamp + oil. Compare West Frisian lampoalje (“lamp-oil”), Dutch lampolie (“lamp-oil”), German Lampenöl (“lamp-oil”), Danish lampeolie (“lamp-oil”), Swedish lampolja (“lamp-oil”), Icelandic lampaolía (“lamp-oil”).
lamp-oil (countable かつ uncountable, 複数形 lamp-oils)