Definify.com
Webster 1913 Edition
Acephalocyst
A-ceph′a-lo-cyst
,Noun.
[Gr.
ἀκέφαλοσ
without a head + κύστισ
bladder.] (Zool.)
A larval entozoön in the form of a subglobular or oval vesicle, or hydatid, filled with fluid, sometimes found in the tissues of man and the lower animals; – so called from the absence of a head or visible organs on the vesicle. These cysts are the immature stages of certain tapeworms. Also applied to similar cysts of different origin.