'Hypoarion' definitions:
Definition of 'Hypoarion'
- Hypoarion \Hy`po*a"ri*on\, n.; pl. Hypoaria. [NL., fr. Gr.
"ypo` beneath + ? a little egg.] (Anat.)
An oval lobe beneath each of the optic lobes in many fishes;
one of the inferior lobes. --Owen.
[1913 Webster]