from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. The passage between the iter and optocoele in the brain.
from the GNU version of the Collaborative International Dictionary of English
- n. The passage between the iter and optocœle in the brain.
from The Century Dictionary and Cyclopedia
- n. The orifice by which each paraqueduct or optic ventricle of the brain communicates with the aqueduct of Sylvius.
- n. A perforation in the capsule membrane of a radiolarian.
New Latin, from Ancient Greek an entrance. (Wiktionary)