third eyelid
Americannoun
noun
Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
The surgery was complicated by the unique characteristics of penguins, such as a third eyelid, which protects their eyes underwater but had a tendency to close during the surgery.
From BBC ● Mar. 17, 2023
His daughter searched for information online and learned about a membrane, or third eyelid, that protects the birds’ peepers in-flight and on fishing expeditions.
From Washington Post ● Jul. 1, 2022
A third eyelid, between the regular eyelids and the cornea, protects the globe and also has a gland at the bottom that produces extra tears.
From New York Times ● Jun. 2, 2014
The vestigial third eyelid in man is enough of itself to prove his relationship with the mammals, but it is only one example out of many.
From The Outline of Science, Vol. 1 (of 4) A Plain Story Simply Told by Thomson, J. Arthur
Anteriorly it is protected by the eyelids, and in birds by a third eyelid that corresponds to the membrana nictitans of quadrupeds.
From Common Diseases of Farm Animals by Craig, R. A., D. V. M.
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
