oilpaper

[ oil-pey-per ]
/ ˈɔɪlˌpeɪ pər /

noun

a paper made waterproof and translucent by treatment with oil.

Origin of oilpaper

First recorded in 1830–40; oil + paper
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019