early 15c., "thin layer of skin or soft tissue of the body," a term in anatomy, from Latin membrana "a skin, membrane; parchment (skin prepared for writing)," from membrum "limb, member of the body" (see member). The etymological sense is "that which covers the members of the body."
"color coarsely with red or rouge," 1630s, from raddle (n.) "red ochre used as paint, layer of red pigment" (mid-14c.), fromrad, a variant of red. Related: Raddled, raddling.
As it were to dream of
morticians' daughters raddled but amorous
[Pound, from Canto LXXIV]