Definition of fenestra in English:



  • 1Anatomy Zoology
    A small natural hole or opening, especially in a bone. The mammalian middle ear is linked by the fenestra ovalis to the vestibule of the inner ear, and by the fenestra rotunda to the cochlea.

    • ‘Displacement of bones obscures anatomical details, but the fenestra ovalis seems to be absent.’
    • ‘The stapes terminates at a well-defined fenestra ovalis, suggesting that the stapes was specialized for hearing.’
    • ‘The maxilla and lacrimal meet on the dorsal rim of this fenestra in a tight, complex suture.’
    • ‘It opened to the outer world through what is presumed to be a fenestra ovalis.’
    • ‘Most of the basal plate has been eliminated to accommodate the increased size of the fenestra ovalis.’
  • 2Medicine
    An artificial opening.

    • ‘Similarly, the postfrontal is damaged ventrally between the orbit and the infraorbital fenestra.’
    • ‘There is a sharp crest along the median symphysis, and the symphysis protrudes into the pelvic fenestra but does not meet with its ischial counterpart.’
    1. 2.1 An opening in a bandage or cast.
      • ‘In our experiments, it is clear that extended imaging does cause the cells to respond; imaging for more than 1.5-2 h results in a significant enlargement of fenestrae and eventually causes the cells to detach.’
      • ‘The supratemporal fenestrae are long and narrow.’
      • ‘The incomplete squamosals also slope laterally and ventrally away from the parietals, slightly depressing posterior margin of the supratemporal fenestrae.’
      • ‘The fused parietals form the posterior two-thirds of the sagittal crest, expanding posteriorly to form a flattened, sculpted deck behind the supratemporal fenestrae adjacent to the squamosals.’
      • ‘The two supratemporal fenestrae begin to close, getting smaller, sometimes asymmetrically.’
    2. 2.2 A perforation in a forceps blade.
      • ‘This expansion allows the jaw musculature to be stronger and also permits a wider gape (in other amniotes, the lateral temporal fenestrae perform a similar function).’
    3. 2.3 A hole made by surgical fenestration.
      • ‘The large post-temporal fenestrae (large holes in the back of the skull) of turtles allow the jaw musculature to expand beyond the confines of the adductor chamber.’
      • ‘As experience mounted the time taken for surgery fell, bigger fenestra were created and the propensity for iatrogenic trauma and hence postoperative scarring diminished.’


Early 19th century (as a botanical term denoting a small scar left by the separation of the seed from the ovary): from Latin, literally ‘window’.