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Any fossil ammonite of the genus Turrilites. The shell forms an open spiral with the later whorls separate.

A stone or fossil which has on it impressions or figures of plants and animals.

A translucent mineral of a green color and pearly or vitreous luster. It is a hydrous arseniate of copper.

Consisting of one letter only; as, a uniliteral word or sign.

Not polite; impolite; rude. -- Un`po*lite"ly, adv. -- Un`po*lite"ness, n.

Amphibole resulting from the alternation of pyroxene by paramorphism. It is not uncommon in massive eruptive rocks.

A meteorite or aërolite. [Obs.] Hutton.

A kind of diorite or diabase containing imbedded whitish spherules, which give the rock a spotted appearance.

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

A group of minerals having, a micaceous structure. They are hydrous silicates, derived generally from the alteration of some kind of mica. So called because the scales, when heated, open out into wormlike forms.

A hydrous phosphate of alumina, occurring usually in hemispherical radiated forms varying in color from white to yellow, green, or black.

Calcium oxalate, occurring in colorless or white monoclinic crystals.

general ethical and religious topics, as distinguished from the prophetic and liturgical literature, and from the law. It is comprised chiefly in the books of Job, Proverbs, Ecclesiasticus, Ecclesiastes, and Wisdom of Solomon. The "wisdom" (Hokhmah) of these writings consists in detached sage utterances on concrete is…

A liquid hydrocarbon found in crude wood spirits.

A tantalate of uranium, yttrium, and calcium, of a brown or black color.

s silicates of alumina, with lime, soda, potash, or rarely baryta. Here are included natrolite, stilbite, analcime, chabazite, thomsonite, heulandite, and others. These species occur of secondary origin in the cavities of amygdaloid, basalt, and lava, also, less frequently, in granite and gneiss. So called because many…

Belonging to an academy or other higher institution of learning; scholarly; literary or classical, in distinction from scientific. "Academic courses." Warburton. "Academical study." Berkeley.

A member of an academy, or society for promoting science, art, or literature, as of the French Academy, or the Royal Academy of arts.

A society of learned men united for the advancement of the arts and sciences, and literature, or some particular art or science; as, the French Academy; the American Academy of Arts and Sciences; academies of literature and philology.

Literally, a befalling; an event that takes place without one's foresight or expectation; an undesigned, sudden, and unexpected event; chance; contingency; often, an undesigned and unforeseen occurrence of an afflictive or unfortunate character; a casualty; a mishap; as, to die by an accident. Of moving accidents by fl…