from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Having the orbital index relatively large; having the orbits narrow transversely.
from the GNU version of the Collaborative International Dictionary of English
- adj. Having the orbital index relatively large; having the orbits narrow transversely; -- opposed to
from The Century Dictionary and Cyclopedia
- In craniometry, having a large index; specifically, having an orbital index over 89; not microseme.
- n. A skull having a large index.
mega- + Ancient Greek sign, mark: compare French mégasème. (Wiktionary)