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ts and numerous invertebrates, the bony portions of many large and remarkable fishes of extinct groups. See the Diagram under Geology.

ed over the second of two adjacent vowels, to denote that they are to be pronounced as distinct letters; as, coöperate, aërial.

Having a single, distinct, diagonal cleavage; -- said of crystals. Mohs.

An extinct eocene bird from New Mexico, larger than the ostrich.

One of a group of extinct reptiles having the jaws armed with a horny beak, as in turtles, and in the genus Dicynodon, supporting also a pair of powerful tusks. Their remains are found in triassic strata of South Africa and India.

Diduction; separation into distinct parts. Bacon.

To perish in any manner; to cease; to become lost or extinct; to be extinguished. Letting the secret die within his own breast. Spectator. Great deeds can not die. Tennyson.

The act of differing; the state or measure of being different or unlike; distinction; dissimilarity; unlikeness; variation; as, a difference of quality in paper; a difference in degrees of heat, or of light; what is the difference between the innocent and the guilty Differencies of administration, but the same Lord. 1…

Distinct; separate; not the same; other. "Five different churches." Addison.

To acquire a distinct and separate character. Huxley.

To take ore from its bed, in distinction from making excavations in search of ore.

To invest with dignity or honor; to make illustrious; to give distinction to; to exalt in rank; to honor. Your worth will dignity our feast. B. Jonson.

Not bright or distinct; wanting luminousness or clearness; obscure in luster or sound; dusky; darkish; obscure; indistinct; overcast; tarnished. The dim magnificence of poetry. Whewell. How is the gold become dim! Lam. iv. 1. I never saw The heavens so dim by day. Shak. Three sleepless nights I passed in sounding on, T…

Characterized by dimorphism; occurring under two distinct forms, not dependent on sex; dimorphic.

A genus of large extinct Devonian ganoid fishes. In some parts of Ohio remains of the Dinichthys are abundant, indicating animals twenty feet in length.

A genus of large extinct Eocene mammals from Wyoming; -- called also Uintatherium. See Illustration in Appendix.

A genus of extinct, ostrichlike birds of gigantic size, which formerly inhabited New Zealand. See Moa. [Written also Deinornis.]

An order of extinct mesozoic reptiles, mostly of large size (whence the name). Notwithstanding their size, they present birdlike characters in the skeleton, esp. in the pelvis and hind limbs. Some walked on their three-toed hind feet, thus producing the large "bird tracks," so-called, of mesozoic sandstones; others wer…

A large extinct proboscidean mammal from the miocene beds of Europe and Asia. It is remarkable fora pair of tusks directed downward from the decurved apex of the lower jaw.

Distinguishing; distinctive; defining. [R.] -- Di`o*ris"tic*al*ly, adv. [R.] Dr. H. More.