chronic

antonym: acute
https://doi.org/10.1351/goldbook.16231
Long-term (in relation to exposure or effect).
Notes:
  1. In experimental toxicology, chronic refers to mammalian studies lasting considerably more than 90 days or to studies occupying a large part of the lifetime of an organism.
  2. In clinical medicine, long-established or long-lasting.
Source:
PAC, 2007, 79, 1583. (Explanatory dictionary of key terms in toxicology (IUPAC Recommendations 2007)) on page 1595 [Terms] [Paper]
Citation: 'chronic' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.16231 RIS BibTex EndNote
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