The Collaborative International Dictionary of English v.0.48:

Almadia \Al`ma*di"a\, Almadie \Al"ma*die\, n. [F. almadie (cf.
   Sp. & Pg. almadia), fr. Ar. alma'd[imac]yah a raft, float.]
   (Naut.)
   (a) A bark canoe used by the Africans.
   (b) A boat used at Calicut, in India, about eighty feet long,
       and six or seven broad.
       [1913 Webster]