Source : Webster's Revised Unabridged Dictionary (1913)

Haema- \H[ae]m"a-\ (? or ?), Haemato- \H[ae]m"a*to-\ (? or ?),
Haemo- \H[ae]m"o-\ (? or ?). [Gr. ai^"ma, blood.]
   Combining forms indicating relation or resemblance to blood,
   association with blood; as, h[ae]mapod, h[ae]matogenesis,
   h[ae]moscope.

   Note: Words from Gr. (?) are written hema-, hemato-, hemo-,
         as well as h[ae]ma-, h[ae]mato-, h[ae]mo-.