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 cretaceous is as below...

Galerite :: Galerite (n.) A cretaceous fossil sea urchin of the genus Galerites.

Lituite :: Lituite (n.) Any species of ammonites of the genus Lituites. They are found in the Cretaceous formation.

Exogyra :: Exogyra (n.) A genus of Cretaceous fossil shells allied to oysters.

Rudistes :: Rudistes (n. pl.) An extinct order or suborder of bivalve mollusks characteristic of the Cretaceous period; -- called also Rudista. See Illust. under Hippurite.

Baculite :: Baculite (n.) A cephalopod of the extinct genus Baculites, found fossil in the Cretaceous rocks. It is like an uncoiled ammonite..

Cretaceously :: Cretaceously (adv.) In a chalky manner; as chalk.

Liriodendron :: Liriodendron (n.) A genus of large and very beautiful trees of North America, having smooth, shining leaves, and handsome, tuliplike flowers; tulip tree; whitewood; -- called also canoewood. Liriodendron tulipifera is the only extant species, but there were several others in the Cretaceous epoch..

Senonian :: Senonian (a.) In european geology, a name given to the middle division of the Upper Cretaceous formation..

Cretose :: Cretose (a.) Chalky; cretaceous.

Laelaps :: Laelaps (n.) A genus of huge, carnivorous, dinosaurian reptiles from the Cretaceous formation of the United States. They had very large hind legs and tail, and are supposed to have been bipedal. Some of the species were about eighteen feet high..

Colorado Group :: Colorado group () A subdivision of the cretaceous formation of western North America, especially developed in Colorado and the upper Missouri region..

Scaphite :: Scaphite (n.) Any fossil cephalopod shell of the genus Scaphites, belonging to the Ammonite family and having a chambered boat-shaped shell. Scaphites are found in the Cretaceous formation..

Ventriculite :: Ventriculite (n.) Any one of numerous species of siliceous fossil sponges belonging to Ventriculites and allied genera, characteristic of the Cretaceous period..

Ichthyosauria :: Ichthyosauria (n. pl.) An extinct order of marine reptiles, including Ichthyosaurus and allied forms; -- called also Ichthyopterygia. They have not been found later than the Cretaceous period..

Mosasaurus :: Mosasaurus (n.) A genus of extinct marine reptiles allied to the lizards, but having the body much elongated, and the limbs in the form of paddles. The first known species, nearly fifty feet in length, was discovered in Cretaceous beds near Maestricht, in the Netherlands..

Supradecompound :: Supracretaceous (a.) Lying above the chalk; Supercretaceous.

Hippurite :: Hippurite (n.) A fossil bivalve mollusk of the genus Hippurites, of many species, having a conical, cup-shaped under valve, with a flattish upper valve or lid. Hippurites are found only in the Cretaceous rocks..

Pteranodon :: Pteranodon (n.) A genus of American Cretaceous pterodactyls destitute of teeth. Several species are known, some of which had an expanse of wings of twenty feet or more..

Neocomian :: Neocomian (n.) A term applied to the lowest deposits of the Cretaceous or chalk formation of Europe, being the lower greensand..

Belemnite :: Belemnite (n.) A conical calcareous fossil, tapering to a point at the lower extremity, with a conical cavity at the other end, where it is ordinarily broken; but when perfect it contains a small chambered cone, called the phragmocone, prolonged, on one side, into a delicate concave blade; the thunderstone. It is the internal shell of a cephalopod related to the sepia, and belonging to an extinct family. The belemnites are found in rocks of the Jurassic and Cretaceous ages..

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