Sentence:  The Common Room and the Library were lit by anbaric light, but the Scholars preferred the older, softer <WSD>naphtha</WSD> lamps in the Retiring Room. 
Meaning of the word marked with <WSD> tags:  Any of a wide variety of aliphatic or aromatic liquid hydrocarbon mixtures distilled from petroleum or coal tar, especially as used in solvents or petrol.