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The Collaborative International Dictionary
Medicornua

Medicornu \Med`i*cor"nu\, n.; pl. Medicornua. [NL., fr. L. medius middle + cornu horn.] (Anat.) The middle or inferior horn of each lateral ventricle of the brain.
--B. G. Wilder.

Wiktionary
medicornua

n. (plural of medicornu English)