Webster's Revised Unabridged Dictionary (1913)

Webster's Revised Unabridged Dictionary (1913 + 1828)

Displaying 1 result(s) from the 1913 edition:

Geology (Page: 621)

Ge*ol"o*gy (?), n.; pl. Geologies (#). [Gr. , , the earth + -logy: cf. F. géologie.]

1. The science which treats: (a) Of the structure and mineral constitution of the globe; structural geology. (b) Of its history as regards rocks, minerals, rivers, valleys, mountains, climates, life, etc.; historical geology. (c) Of the causes and methods by which its structure, features, changes, and conditions have been produced; dynamical geology. See Chart of The Geological Series.

2. A treatise on the science.

Displaying 1 result(s) from the 1828 edition:

GEOL''OGY, n. [Gr. the earth, and discourse.]

The doctrine or science of the structure of the earth or terraqueous globe, and of the substances which compose it; or the science of the compound minerals or aggregate substances which compose the earth, the relations which the several constituent masses bear to each other, their formation, structure, position and direction: it extends also to the various alterations and decompositions to which minerals are subject.