Opening(s) or window(s) at base of a staminal tube (e.g. in many papilionoid legumes).
A small opening in the ear.
Windowlike opening, sometimes closed by a membrane. The fenestra ovalis fenestra vestibuli), or oval window, and the fenestra rotonda (fenestra cochleae), or round window, are two openings in the ear.
Small opening to relieve pressure; microscopic openings in capillaries for the purpose of filtration within the glomerular capillaries of the kidneys.