sessile marine coelenterates including solitary and colonial polyps; the medusoid phase is entirely suppressed
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.
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Synapsid
extinct reptile having a single pair of lateral temporal openings in the skull
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primitive reptile having no opening in the temporal region of the skull; all extinct except turtles
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.primitive reptile having no opening in the temporal region of the skull; all extinct except turtles
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.air-breathing arthropods characterized by simple eyes and four pairs of legs
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.air-breathing arthropods characterized by simple eyes and four pairs of legs
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.invertebrate having jointed limbs and a segmented body with an exoskeleton made of chitin
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.horseshoe crab of the coast of eastern Asia
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.chiefly nocturnal predacious arthropod having a flattened body of 15 to 173 segments each with a pair of legs, the foremost pair being…
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.used in some classifications; includes the orders Xiphosura and Eurypterida
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp a…
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.radially symmetrical animals having saclike bodies with only one opening and tentacles with stinging structures; they occur in polyp a…
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.reptile having a pair of openings in the skull behind each eye
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.reptile having a pair of openings in the skull behind each eye
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.used in former classifications to include all living reptiles except turtles; superseded by the two subclasses Lepidosauria and Archos…
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.large extinct scorpion-like arthropod considered related to horseshoe crabs
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.mammals having a placenta; all mammals except monotremes and marsupials
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.mammals having a placenta; all mammals except monotremes and marsupials
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.small nonvenomous arachnid resembling a tailless scorpion
Used in the same subject area: Biology, Nature and environment, Animals, Zoology.
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Their definitions overlap or refer to similar ideas. Use these to widen your search, then compare the exact meanings.
A genus of large extinct mammals from the miocene strata of western North America. They were allied to the rhinoceros, but the skull b…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.One of the orders of myriapods, including the centipeds. They have a single pair of elongated legs attached laterally to each segment;…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.The skull of an animal; especially, that part of the skull, either cartilaginous or bony, which immediately incloses the brain; the br…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.That which is cropped, cut, or gathered from a single felld, or of a single kind of grain or fruit, or in a single season; especially,…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.insects having usually a single pair of functional wings (anterior pair) with the posterior pair reduced to small knobbed structures a…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.An extinct, long-necked, marine, cretaceous reptile from Kansas, allied to Plesiosaurus.
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.An extinct marine reptile from the coal measures of Nova Scotia; -- so named because supposed to be of the earliest known reptiles.
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.One of the first pair of lateral plates in the plastron of turtles.
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.A pit, groove, cavity, or depression, of greater or less depth; as, the temporal fossa on the side of the skull; the nasal fossae cont…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.An eel-like marine marsipobranch (Myxine glutinosa), allied to the lamprey. It has a suctorial mouth, with labial appendages, and a si…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.An extinct genus of Tertiary mammals allied to the horse, but three-toed, having on each foot a small lateral hoof on each side of the…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.Of, pertaining to, or resembling, an extinct genus of sharks (Hybodus), especially in the form of the teeth, which consist of a princi…
Its definition shares important concepts with this word: extinct, reptile, single, pair, lateral.
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