from Wiktionary, Creative Commons Attribution/Share-Alike License
- n. A round hole or circle with which an opening for an arrow slit terminates.
from the GNU version of the Collaborative International Dictionary of English
- n. A small opening or loophole, sometimes circular, used in mediæval fortifications.
- n. A small circular opening, and ring of moldings surrounding it, used in window tracery in Gothic architecture.
from The Century Dictionary and Cyclopedia
- n. See oilet.
Derived from French œil 'eye', in turn derived from Latin oculum (accusative form of oculus). (Wiktionary)