nasolabial triangle

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English

Noun

nasolabial triangle (uncountable)

  1. (anatomy) A triangular area of the face encompassing the lips and nose.
    • 1933, The Year Book of Pediatrics‎, volume 1940:
      For that reason they may appear frequently in syntropism with the sharply demarcated malar flush and anemic nasolabial triangle, even without scarlet fever.
    • 1959, U.S. Surgeon General's Office, Translations from the Soviet Literature on Hemorrhagic Fever: 1944–1951‎, page 2:
      Hyperemia of the face, which stands out during the first few days of the illness (white nasolabial triangle), is changed to a peculiar paleness of the face that looks like a mask.
    • 1988, John M. Loré, An Atlas of Head and Neck Surgery‎, page 400:
      Before all these sutures are tied, the mucous membranes of the edges of the nasolabial triangle are closed.
    • 2009, Melvin A. Shiffman, editor, Autologous Fat Transfer: Art, Science, and Clinical Practice‎, Springer, page 422:
      This is especially likely to occur in the presence of infection in the upper lip, lower part of the nose, and adjoining nasolabial triangle.

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