Temporal Concept
chronic Audio
chron·ic [ kron-ik ]
Definitions related to chronic:
  • A disease or condition that persists or progresses over a long period of time.
    NCI Dictionary of Cancer Terms
    U.S. National Cancer Institute, 2021
  • Any condition that lasts a long time or recurs over time.
    Harvard Dictionary of Health Terms
    Harvard Medical Publishing, 2011
  • Morphologic changes that are persistent or long standing.
    CDISC Terminology
    Clinical Data Interchange Standards Consortium (CDISC), 2021
  • Slow, creeping onset, slow progress and long continuance of disease manifestations.
    Human Phenotype Ontology (HPO)
    The Human Phenotype Ontology Project, 2025
  • Usually used to describe a condition that is persistent and long standing.
    NCI
    U.S. National Cancer Institute, 2021
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This content should not be used in place of medically-reviewed decision support reference material or professional medical advice. Some terms may have alternate or updated definitions not reflected in this set. The definitions on this page should not be considered complete or up to date.