Thanks for using this online dictionary, we have been helping millions of people improve their use of the english language with its free online services. English definition of biconcave is as below...

Rhynchocephala :: Rhynchocephala (n. pl.) An order of reptiles having biconcave vertebrae, immovable quadrate bones, and many other peculiar osteological characters. Hatteria is the only living genus, but numerous fossil genera are known, some of which are among the earliest of reptiles. See Hatteria. Called also Rhynchocephalia..

Ichthyosaurus :: Ichthyosaurus (n.) An extinct genus of marine reptiles; -- so named from their short, biconcave vertebrae, resembling those of fishes. Several species, varying in length from ten to thirty feet, are known from the Liassic, Oolitic, and Cretaceous formations..

Teleosaur :: Teleosaur (n.) Any one of several species of fossil suarians belonging to Teleosaurus and allied genera. These reptiles are related to the crocodiles, but have biconcave vertebrae..

Amphicoelous :: Amphicoelous (a.) Having both ends concave; biconcave; -- said of vertebrae.

Ichthyornis :: Ichthyornis (n.) An extinct genus of toothed birds found in the American Cretaceous formation. It is remarkable for having biconcave vertebrae, and sharp, conical teeth set in sockets. Its wings were well developed. It is the type of the order Odontotormae..

Thecodontia :: Thecodontia (n. pl.) A group of fossil saurians having biconcave vertebrae and the teeth implanted in sockets.

Biconcave :: Biconcave (a.) Concave on both sides; as, biconcave vertebrae..

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