tor·toise·shell /ˈtɔrtəˌʃɛl, əʃˌʃɛl/
  龜甲;蝴蝶之一種
  tortoiseshell
       n 1: the mottled horny substance of the shell of some turtles
       2: brilliantly colored; larvae feed on nettles [syn: tortoiseshell
          butterfly]
       3: a cat having black and cream and yellowish markings [syn: tortoiseshell-cat,
           calico cat]