onionskin

• onion skin

From onion +‎ skin; named for its resemblance to the skin of an onion (thin and crinkly).

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onionskin (countable and uncountable, plural onionskins)

1. A thin, strong, light, translucent paper; used especially for making carbon copies.

   Synonym: onion paper

   • 1952, Ralph Ellison, Invisible Man, Penguin Books (2014), page 406:

     I heard the dry-leaf rustle of onionskin papers.

2. A kind of marble with swirls of color on the outside.