C1 noun #10,000 最常用

obanthropion

A rare anatomical term referring to the vertical groove or indentation in the middle of the upper lip, situated between the nose and the vermilion border. While commonly known as the philtrum in modern medical and everyday contexts, this term is primarily found in archaic medical literature or highly specialized vocabulary tests.

近义词

philtrum medial groove infra-nasal depression prolabium labial groove

反义词

convexity protrusion
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