sheep·skin 
(shēpskĭn′)
(shēpskĭn′)n.
1. The skin of a sheep either tanned with the fleece left on or in the form of leather or parchment.
2. Informal A diploma.
- tripeptide
- tripetalous
- trip hammer
- triphammer
- trip-hammer
- triphenylmethane
- triphibian
- trip-hop
- triphosphate
- triphosphopyridine nucleotide
- triphthong
- triphthongal
- tripinnate
- tripinnately
- triplane
- triple
- triple agent
- triple alpha process
- triple bond
- Triple Crown
- triple-decker
- triple-digit
- triple digits
- triple-double
- triple figure