A medical term for a larval stage of certain tapeworms that lacks a visible head or distinct organs, formed as a fluid-filled sac.
From Greek 'a-' (without) + 'kephale' (head) + 'kytos' (cell/hollow) + '-is' (medical condition). This scientific term combines classical Greek medical terminology to describe parasitic larval structures.
Acephalocysts are actually the headless larval form of echinococcus tapeworms—they float around inside infected animals like disgusting water balloons, and this is why proper food handling matters when you learn parasitology.
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