Try Our Apps


90s Slang You Should Know


[fi-nes-truh] /fɪˈnɛs trə/
noun, plural fenestrae
[fi-nes-tree] /fɪˈnɛs tri/ (Show IPA)
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.
Origin of fenestra
1820-30; < New Latin, special use of Latin fenestra window, hole (in a wall)
Related forms
fenestral, adjective
unfenestral, adjective Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2017.
Cite This Source
Examples from the Web for fenestra
Historical Examples
British Dictionary definitions for fenestra


noun (pl) -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 Forms
fenestral, adjective
Word Origin
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
Cite This Source
fenestra in Medicine

fenestra fe·nes·tra (fə-něs'trə)
n. pl. fe·nes·trae (-trē')

  1. A small anatomical opening, often closed by a membrane.

  2. The opening in a bone made by surgical fenestration.

  3. A specialized opening, as in a surgical instrument.

fe·nes'tral adj.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
Cite This Source

Word of the Day

Difficulty index for fenestra

Few English speakers likely know this word

Word Value for fenestra

Scrabble Words With Friends

Nearby words for fenestra