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Webster 1913 Edition
Haematozoon
‖
Haemˊa-to-zo′on
(-tō̍-zō′ŏn)
, Noun.
pl. 
Haematozoa 
(-ȧ)
. [NL., fr. Gr. 
αἷμα
, αἵματος
, blood + ζῶ,ον 
animal.] (Zool.) 
A parasite inhabiting the blood
; esp.: (a) 
Certain species of nematodes of the genus 
Filaria
, sometimes found in the blood of man, the horse, the dog, etc. (b) 
The trematode, 
Bilharzia haematobia
, which infests the inhabitants of Egypt and other parts of Africa, often causing death.