Age Group
infant Audio
in·fant [ in-fuh nt ]
Definitions related to infant:
  • A child between 1 and 23 months of age.
    NLM Medical Subject Headings
    U.S. National Library of Medicine, 2021
  • An age group comprised of individuals between one month and two years of age.
    NCI Thesaurus
    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.