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About Thesaurus and Glossary
What's New in 2015 Edition

The 2015 edition is the fourteenth edition of the Agricultural Thesaurus, first released by the National Agricultural Library in 2002. Terminology is available in both English and Spanish versions. Taxonomic terms from every biological kingdom were expanded in this edition, along with common names of species. Plant species were added following taxonomic verification by the Germplasm Resources Information Network (GRIN). The Report of the International Committee on Taxonomy of Viruses (2013 release) was the authoritative reference for viruses new to this edition. Fish taxonomy was expanded following taxonomic verification from Fishbase. Terminology for genetic soil types was updated according to USDA Keys to Soil Taxonomy, Twelfth  Edition, 2014 and other resources. New pesticides were added from the Agricultural Marketing Service’s Pesticide Data Program. Other subject areas expanded include terms in chromatography, receptors, bacteria, fungi, breeds of animals, endangered species, insects, chemicals, enzymes, economics, food, wood and forestry. Silvics of North America Glossary, Wildland Planning Glossary and Wood Handbook Glossary were the authoritative resources for wood and forest related terminology and their definitions. The 2015 edition contains 4488 new definitions, which appear in the thesaurus and separate glossary.

Please consult the list of new descriptors for this new edition.
Thanks are extended to AgNIC members, IICA partners, Dr. John Wiersema and Carole Ritchie at GRIN, and to all those who proposed suggestions for changes to this edition. Users are encouraged to send us comments so that we may continue to improve this resource.


  • English
    • Total Terms - 110,038
    • Lead-in Terms - 51,926
    • Preferred Terms - 58,112
    • Subject Categories - 17
    • Scope Notes - 948
    • Definitions - 4,488
  • Spanish
    • Total Terms - 87,582
    • Lead-in Terms - 29,470
    • Preferred Terms - 58,112
    • Subject Categories - 17
    • Scope Notes - 518
    • Definitions - 4,465
Last Modified: Dec 10, 2014
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About Thesaurus and Glossary
  What's New in 2015 Edition
    List of New Descriptors
    List of Replaced Descriptors
  Background and Applications
  Thesaurus Structure
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