fo·ra·men 
(fə-rāmən)
(fə-rāmən)n. pl. fo·ram·i·na (-rămə-nə) or fo·ra·mens
An opening or orifice, as in a bone or in the covering of the ovule of a plant.
[Latin forāmen, an opening, from forāre, to bore.]
fo·rami·nal (-rămə-nəl), fo·rami·nous (-nəs) adj.