Entry: unfenestrated (adj.)
Definition: 1884 C. B. Kelsey Dis. Rectum vii. 209 A good, fresh, unfenestrated drainage-tube.
While I’m sure the term is entirely clear now, I’ll provide a bit of extra information for the detail-oriented crowd.
Fenestrated (adj.): 1. Archit. Furnished with windows.
Or In scientific use: Pierced with a hole or with holes; perforated. ‘ fenestrated membrane (Anat.): that form of the elastic tissue of the middle or contractile coat of the arteries, in which it presents a homogeneous membrane the meshes of which appear as simple perforations’ (Hoblyn, 1868).
SNOOT score: 2
Source: Oxford English Dictionary