From The Collaborative International Dictionary of English v.0.48 [gcide]:
Note: The word is applied to the ventricles of the brain, the different ventricles being indicated by prefixes like those characterizing the parts of the brain in which the cavities are found; as, epic[oe]lia, mesoc[oe]lia, metac[oe]lia, proc[oe]lia, etc. --B. G. Wilder. Coeliac
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