The word "Petroline" is spelled with the phonetic transcription /ˈpɛtrəʊlaɪn/. This means that the first syllable is pronounced as "pet-," and the second syllable is pronounced as "-roh-line." The "r" sound in the second syllable is emphasized, as indicated by the second slash on top of the letter "r." The word refers to a pipeline that is used for transporting petroleum, and its correct spelling is important in order to avoid confusion or errors in written communication regarding the petroleum industry.
A substance resembling paraffine, obtained by distillation from the petroleum of Rangoon.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.