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A small membrane-covered opening (especially one in the bone between the middle and inner ear)
Answer for the clue "A small membrane-covered opening (especially one in the bone between the middle and inner ear) ", 8 letters:
fenestra
Alternative clues for the word fenestra
Word definitions for fenestra in dictionaries
Wikipedia
Word definitions in Wikipedia
In histology, fenestræ are small pores in endothelial cells that allow for rapid exchange of molecules between fenestrated blood vessels , sinusoid blood vessels and surrounding tissue. These pores may enlarge and contract at the action of various stimuli ...
Wiktionary
Word definitions in Wiktionary
n. an opening in a body, sometimes with a membrane
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Fenestra \Fe*nes"tra\, n.; pl. Fenestr[ae] . [L., a window.] (Anat.) A small opening; esp., one of the apertures, closed by membranes, between the tympanum and internal ear.
WordNet
Word definitions in WordNet
n. a small membrane-covered opening (especially one in the bone between the middle and inner ear) [also: fenestrae (pl)]
Usage examples of fenestra.
In the Saurischia, this indentation is large and carries at least one fenestra, whereas in the Ornithischia the fossa as well as its fenestra are significantly reduced or missing.
Great apertures, the fenestrae, occur in the cheek region of the skull, behind the eyes, and also along the sides of the snout.
These fenestrae are characteristic of all theropods, and indeed of all primitive dinosaurs, but in allosaurs and abelisaurs they were relatively larger than in others.
Each skull was twice as long as it was high, with large eyeholes, gaping pre-orbital fenestrae halfway down the snout, and elliptical nares.
Excess salt would be eliminated from the small openings over his pre-orbital fenestrae, on either side of his muzzle.
They can be distinguished from the primitive archosauromorphs by the presence of an opening in the skull in front of the eye, the antorbital fenestra.