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amphibian any cold-blooded vertebrate, such as a frog or salamander, that has aquatic gill-breathing larvae and terrestrial lung-breathing adults. [1/4 definitions]
back the part of a human or other vertebrate that is on the opposite side from the chest and abdomen and between the neck and the tailbone. [1/15 definitions]
bird a warm-blooded, egg-laying vertebrate animal with wings and feathers, which usu. has the ability to fly. [1/5 definitions]
chordate of or denoting an animal, such as a tunicate, lancelet, or vertebrate, that at some stage of development has gill slits, a dorsal nerve cord, and a notochord.
craniate an animal with a cranium or skull; vertebrate. [1/2 definitions]
cranium the skull of a vertebrate animal. [1/2 definitions]
ear1 the organ of hearing in man and vertebrate animals. [1/4 definitions]
foot in vertebrate animals, the lower part of the leg below the ankle joint, on which the body stands and moves. [1/10 definitions]
forebrain the anterior of the three divisions of the brain of a vertebrate embryo; prosencephalon. [1/2 definitions]
invertebrate without a spinal column or backbone; not vertebrate. [1/3 definitions]
mammal any of the vertebrate animals that feed their babies with milk from the female mammary glands and usu. produce live young, as opposed to laying eggs.
midbrain the middle of three brain parts in a vertebrate embryo and the part of the adult brain into which this develops; mesencephalon.
naris one of the outer openings of the vertebrate nose; nostril or nasal passage.
nephridium the rudiment of an excretory organ of a vertebrate embryo, which later develops into a kidney. [1/2 definitions]
pectoral fin in fishes, either of a pair of fins situated on the sides behind the head, corresponding to the forelimbs in other vertebrate animals.
pelvic girdle in a vertebrate, the skeletal structure of bone, cartilage, or both to which the hind legs, fins, or the like are attached; pelvic arch.
radius one of the two bones of the vertebrate forearm or lower forelimb. (Cf. ulna). [1/7 definitions]
reptile any of the class of vertebrate cold-blooded animals, including lizards, turtles, snakes, crocodiles, and the like, that breathe with lungs, are covered with scales or hard plates, and have short legs or none at all. [1/3 definitions]
skeleton the inner framework of bones and cartilage in vertebrate animals, which supports and protects the softer body parts, or the hard external shell of invertebrates and some vertebrates. [1/4 definitions]
spinal column in vertebrate animals, the row of vertebrae linked together to form the axis of the skeleton and protect the spinal cord; spine; backbone.
spinal cord the thick cord of nerve tissue that extends through the inner canal of the spinal column from the base of the brain to the end of the spine of any vertebrate animal.