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The Glossary of Geology is now available online on an annual access fee basis through the AGI website. The Glossary of Geology is widely recognized as the primary source for terminology in the field of the geosciences, utilizing the expertise of the more than 100 geoscientists who participated as volunteers in the process of reviewing the definitions, adding new terms, and revising the cited references.

The online Glossary provides access to the more than 39,000 glossary entries contained in the Fifth Edition of the print Glossary. In addition to the 13,000 updated entries that appeared in the Fifth Edition, more than 1100 changes, deletions and additions have been made to the online version since the publication of the print edition -- making the online Glossary even more up-to-date.

Users can learn the difference between look-alike pairs, such as sylvanite (a mineral) and sylvinite (a rock); the origin of terms; the meaning of abbreviations and acronyms common in the geoscience vocabulary; the dates many terms were first used; the meaning of certain prefixes; and the preferred term of two or more synonyms. Many Glossary entries contain a syllabification guide and background information.

The online Glossary is searchable using terms, words within terms or definitions, categories and Spanish-language equivalents. Boolean operators (and/or/not) are available for each search field. Search fields may also be combined or may be browsed using a pop-up word wheel.

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