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n. pl. fe·nes·trae (-trē′)
1. Anatomy A small anatomical opening, as in a bone.
2. An opening in a bone made by surgical fenestration.
3. Zoology A transparent spot or marking, as on the wing of a moth or butterfly.

[Latin, window.]

fe·nes′tral adj.


n, pl -trae (-triː)
1. (Biology) biology a small opening in or between bones, esp one of the openings between the middle and inner ears
2. (Zoology) zoology a transparent marking or spot, as on the wings of moths
3. (Architecture) architect a window or window-like opening in the outside wall of a building
[C19: via New Latin from Latin: wall opening, window]
feˈnestral adj


(fɪˈnɛs trə)

n., pl. -trae (-trē).
1. a small opening or perforation, as in a bone, esp. either of the two oval openings between the middle and inner ears.
2. a transparent spot in an otherwise opaque surface, as in the wings of certain butterflies and moths.
[1820–30; < New Latin; Latin fenestra window, hole (in a wall)]
fe•nes′tral, adj.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.fenestra - a small opening covered with membrane (especially one in the bone between the middle and inner ear)
orifice, porta, opening - an aperture or hole that opens into a bodily cavity; "the orifice into the aorta from the lower left chamber of the heart"
ear - the sense organ for hearing and equilibrium
fenestra of the vestibule, fenestra ovalis, fenestra vestibuli, oval window - fenestra that has the base of the stapes attached to it
otology - the branch of medicine concerned with the ear