The Collaborative International Dictionary of English v.0.48:

Leucocythaemia \Leu`co*cy*th[ae]"mi*a\ Leucocythemia
\Leu`co*cy*the"mi*a\ ](l[=u]`k[-o]*s[-i]*th[=e]"m[i^]*[.a]), n.
   [NL., fr. Gr. leyko`s white + ky`tos a hollow vessel + a"i^ma
   blood.] (Med.)
   Same as leukemia.
   [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

leukaemia \leu*k[ae]"mi*a\ (l[-u]*k[=e]"m[i^]*[.a]), n.
   A disease in which the white corpuscles of the blood are
   largely increased in number, and there is enlargement of the
   spleen, or the lymphatic glands; formerly called
   leucocythaemia. It is due to a cancer of the bone marrow,
   and results in anemia and increased susceptibility to
   infectious disease. [Also spelled leucemia and
   leuchaemia.]
   [1913 Webster +PJC] Leuke