goldbeater's skin

[ gohld-bee-terz ]
/ ˈgoʊldˌbi tərz /

noun

the prepared outside membrane of the large intestine of the ox, used by goldbeaters to lay between the leaves of the metal while they beat it into gold leaf.

Origin of goldbeater's skin

First recorded in 1700–10; gold + beater + 's1

British Dictionary definitions for goldbeater's skin

goldbeater's skin
/ (ˈɡəʊldˌbiːtəz) /

noun

animal membrane used to separate sheets of gold that are being hammered into gold leaf