The Collaborative International Dictionary of English v.0.48:

Haematic \H[ae]*mat"ic\ (h[-e]*m[a^]t"[i^]k), a. [Gr.
   a"imatiko`s]
   Of or pertaining to the blood; sanguine; brownish red.
   [1913 Webster]

   H[ae]matic acid (Physiol.), a hypothetical acid, supposed
      to be formed from hemoglobin during its oxidation in the
      lungs, and to have the power of freeing carbonic acid from
      the sodium carbonate of the serum. --Thudichum.
      [1913 Webster]