tortoiseshell

Short definition from Wiktionary

Noun

1. 1
   The horny, translucent, mottled covering of the carapace of the hawksbill turtle, used as a veneer etc.
2. 2
   The hawksbill turtle.
3. 3
   A domestic cat (or a rabbit, guinea-pig, etc.) whose fur has black, brown and yellow markings.
4. 4
   Any of several butterflies, mostly of the genera Nymphalis and Aglais that have similar markings.

Adjective

1. 1
   Made of the covering of carapace of hawksbill turtle.
2. 2
   Having markings resembling covering of carapace of hawksbill turtle.