The Collaborative International Dictionary of English v.0.48:

Micmacs \Mic"macs\, n. pl.; sing. Micmac. (Ethnol.)
   A tribe of Indians inhabiting Nova Scotia and New Brunswick.
   [Written also Mikmaks.]
   [1913 Webster]

WordNet (r) 3.0 (2006):

Micmac
    n 1: a member of the Algonquian people inhabiting the Maritime
         Provinces of Canada [syn: Micmac, Mikmaq]
    2: the Algonquian language of the Micmac