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About Thesaurus and Glossary
What's New in 2019 Edition

The 2019 National Agricultural Library Thesaurus (NALT), available here in English and Spanish, contains 319 new definitions in the thesaurus and a separate glossary. New for 2019 are an expansion of taxonomic terms from every biological kingdom including common species names; Latin plant names using taxonomic verification by the Germplasm Resources Information Network (GRIN), Long-Term Agroecosystem Research Network (LTAR) related terms, and many virus names guided by the Report of the International Committee on Taxonomy of Viruses. Other subject areas expanded are agricultural technology, human nutrition and diet, genetics, chemistry, enzymes, food sciences, health, pathology and ecological sciences. The 2019 NALT is the 18th edition; it was originally released in 2002.

Please consult the list of new terms for this edition.

Thanks are extended to AgNIC members, IICA partners, Dr. Melanie Schori 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 - 139,328
    • Lead-in Terms - 65,187
    • Preferred Terms - 74,141
    • Subject Categories - 17
    • Scope Notes - 762
    • Definitions - 5,937
  • Spanish
    • Total Terms - 116,067
    • Lead-in Terms - 41,926
    • Preferred Terms - 74,141
    • Subject Categories - 17
    • Scope Notes - 761
    • Definitions - 5,937
Last Modified: Dec 21, 2018
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About Thesaurus and Glossary
  What's New in 2019 Edition
    List of New Terms
    List of Replaced Descriptors
  Background and Applications
  Thesaurus Structure
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