Wordnet 3.0
ADJECTIVE (2)
1.
of or relating to or having a fenestra;
2.
of or relating to windows;
The Collaborative International Dictionary of English v.0.48:
Fenestral \Fe*nes"tral\, a. [L. fenestra a window.]
1. (Arch.) Pertaining to a window or to windows.
[1913 Webster]
2. (Anat.) Of or pertaining to a fenestra.
[1913 Webster]
The Collaborative International Dictionary of English v.0.48:
Fenestral \Fe*nes"tral\, n. (Arch.)
A casement or window sash, closed with cloth or paper instead
of glass. --Weale.
[1913 Webster]
WordNet (r) 3.0 (2006):
fenestral
adj 1: of or relating to or having a fenestra
2: of or relating to windows