sheepskin

noun

1. the skin of a sheep, especially such a skin dressed with the wool on, as for a garment.
2. leather, parchment, or the like, made from the skin of sheep.
3. Informal. a diploma.

adjective

4. made from the skin of a sheep.
5. (of a garment) lined with the skin of a sheep dressed with the wool on.

noun

1. 1. the skin of a sheep, esp when used for clothing, etc, or with the fleece removed and used for parchment
   2. (as modifier)a sheepskin coat

n.c.1200, “the skin of a sheep,” from sheep + skin (n.). Meaning “diploma” dates from 1804; so called because formerly made of sheepskin parchment.