The Collaborative International Dictionary of English v.0.48:

Saibling \Sai"bling\, n. [Dial. G.] (Zool.)
   A European mountain trout (Salvelinus alpinus); -- called
   also Bavarian charr.
   [1913 Webster]

WordNet (r) 3.0 (2006):

Salvelinus alpinus
    n 1: small trout of northern waters; landlocked populations in
         Quebec and northern New England [syn: Arctic char,
         Salvelinus alpinus]