The nictitating membrane (from Latin nictare, to blink) is a transparent or translucent third eyelid present in some animals that can be drawn across the...

translucent third eyelid called a nictitating membrane, while others have a vestigial nictitating membrane. The membrane works to protect and moisten the...

generally characterized by lacking traits such as an anal fin, nictitating membrane, or suborbital shelves in the cranium. Squalomorphii sharks are also...

Cherry eye is a disorder of the nictitating membrane (NM), also called the third eyelid, present in the eyes of dogs and cats. Cherry eye is most often...

eyeball, restricting movement. It is the vestigial remnant of the nictitating membrane (the "third eyelid") which is drawn across the eye for protection...

patella, hip dysplasia, and Legg-Calvé-Perthes disease. Prolapsed nictitating membrane gland is also common in puggles despite not being prevalent in either...

found in other animals, some of which may have a third eyelid, or nictitating membrane. A vestige of this in humans survives as the plica semilunaris. The...

with vertical slits. They do not have a true eyelid, but rather a nictitating membrane that allows light to enter the eye so that they will awaken when...

Instead the eye is lubricated by the nictitating membrane, a third eyelid that moves horizontally. The nictitating membrane also covers the eye and acts as...

by the nictitating membrane, a third concealed eyelid that sweeps horizontally across the eye like a windscreen wiper. The nictitating membrane also covers...

especially in animals without eyelids. In squamate reptiles both the nictitating membrane and the eyelids have been suggested as the evolutionary origin of...

the inside corner of the eye. It is the vestigial remnant of the nictitating membrane, i.e., third eyelid, an organ that is fully functional in some other...

tetrapods (reptiles, amphibians, birds and mammals) that possess a nictitating membrane. The gland can be compound tubular or compound tubuloalveolar, and...

shark. Members of this order are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits....

Pertaining to the nostrils. nasoral Between the nostrils and mouth. nictitating membrane An inner eyelid. notochord A rudimentary of embryonic spinal column...

rather than representing true trichromatic vision. Cats also have a nictitating membrane, allowing them to blink without hindering their vision. The domestic...

rodents in the dark. Most reptiles, as well as birds, possess a nictitating membrane, a translucent third eyelid which is drawn over the eye from the...

may form a part of the courtship display, such as in weaver birds. nictitating membrane Also, third eyelid. A transparent or translucent third eyelid that...

medicine, signs can include partial closure of the third eyelid, or nictitating membrane.[citation needed] Horner's syndrome is usually acquired as a result...

sharks. Members of this order are characterized by the presence of a nictitating membrane over the eyes, two dorsal fins, an anal fin, and five gill slits...

species, like other dippers, is equipped with an extra eyelid called a nictitating membrane that allows it to see underwater, and scales that close its nostrils...

Male portrait Female portrait Just after a dive - showing clear nictitating membrane In flight over Rideau River, Ottawa, Ontario With a northern crayfish...

usually possess spines, they usually have a sharp head, no anal fin or nictitating membrane, and five to seven gill slits. In most other respects, however, they...

making up lies about John grabbing her. Libby sees that John has a nictitating membrane and tries to pull Michelle away from John but Michelle slaps Libby...

flatworm Oculotrema hippopotami infests hippopotamus eyes, mainly the nictitating membrane. It is the only monogenean species (which normally live on fish)...

comparable to human eyelashes. Eagles have a third eyelid also known as a nictitating membrane, which "grows in the inner corner of the eye, next to the tear duct"...

massive head, and "little"-appearing eyes, which can be protected by a nictitating membrane. The Gila monster has four close living relatives, all of which are...

eyelid known as a nictitating membrane, whereas most other primates have a lesser developed plica semilunaris. The nictitating membrane keeps the cornea...

common in the crossbreed than both of the parent breeds. Prolapsed nictitating membrane gland is a condition more common in the Puggle and Jug than both...

sharks. Members of the orders are characterized by the presence of a nictitating membrane over the eye, two dorsal fins, an anal fin, and five gill slits....