The Collaborative International Dictionary of English v.0.48:

Thylacine \Thy"la*cine\, n. [Gr. ? a sack.] (Zool.)
   The zebra wolf. See under Wolf.
   [1913 Webster]

WordNet (r) 3.0 (2006):

thylacine
    n 1: rare doglike carnivorous marsupial of Tasmania having
         stripes on its back; probably extinct [syn: thylacine,
         Tasmanian wolf, Tasmanian tiger, Thylacinus
         cynocephalus]