what does the word geology
Wiktionary (0.00 / 0 votes) Rate this definition: geology (Noun). The science that studies the structure of the earth (or other planets), together with its origin and development, especially by examination of its rocks. Origin: From Modern geologia, from γῆ + -logia.
In more scientific terms, geology is the study of the Earth's origin, structure, composition and history, (including the development of life) and the nature of the processes which have given rise to the Earth as we know it today. In geology, rock is a naturally occurring mixture of minerals.