nasolabial triangle en · NOUN
Meanings
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(uncountable) A triangular area of the face encompassing the lips and nose.
This is especially likely to occur in the presence of infection in the upper lip, lower part of the nose, and adjoining nasolabial triangle.
2009, Melvin A. Shiffman, editor, Autologous Fat Transfer: Art, Science, and Clinical Practice, Springer, page 422:For that reason they may appear frequently in syntropism with the sharply demarcated malar flush and anemic nasolabial triangle, even without scarlet fever.
1933, The Year Book of Pediatrics, volume 1940: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.
1959, U.S. Surgeon General's Office, Translations from the Soviet Literature on Hemorrhagic Fever: 1944–1951, page 2:Before all these sutures are tied, the mucous membranes of the edges of the nasolabial triangle are closed.
1988, John M. Loré, An Atlas of Head and Neck Surgery, page 400:
Synonyms
danger triangle of the face · danger triangle · triangle of death