[ fi-nes-truh ]
/ fɪˈnɛs trə /

noun, plural fe·nes·trae [fi-nes-tree] /fɪˈnɛs tri/.

Anatomy, Zoology. a small opening or perforation, as in a bone, especially between the middle and inner ear.
Entomology. a transparent spot in an otherwise opaque surface, as in the wings of certain butterflies and moths.
Architecture. a windowlike opening.

Nearby words

  1. fender bender,
  2. fender pile,
  3. fendered,
  4. feneration,
  5. fenestella,
  6. fenestra of cochlea,
  7. fenestra of vestibule,
  8. fenestrated,
  9. fenestrated capillary,
  10. fenestrated membrane

Origin of fenestra

1820–30; < New Latin, special use of Latin fenestra window, hole (in a wall)

Related formsfe·nes·tral, adjectiveun·fe·nes·tral, adjective

Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019

Examples from the Web for fenestra

British Dictionary definitions for fenestra


/ (fɪˈnɛstrə) /

noun plural -trae (-triː)

biology a small opening in or between bones, esp one of the openings between the middle and inner ears
zoology a transparent marking or spot, as on the wings of moths
architect a window or window-like opening in the outside wall of a building
Derived Formsfenestral, adjective

Word Origin for fenestra

C19: via New Latin from Latin: wall opening, window

Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Medicine definitions for fenestra


[ fə-nĕstrə ]

n. pl. fe•nes•trae (-trē′)

A small anatomical opening, often closed by a membrane.
The opening in a bone made by surgical fenestration.
A specialized opening, as in a surgical instrument.
Related formsfe•nestral adj.

The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.