noun
Rare anatomical term for gums. In everyday language, 歯肉 (しにく) is used instead.
See also: 歯肉
歯齦炎は歯肉の炎症を指す医学用語です。
Gingivitis is a medical term for inflammation of the gums.
歯肉 is the common, everyday word for gums, while 歯齦 is a rare anatomical term.
The kanji 齦 is a rare character specifically meaning gums. The reading しぎん is the on'yomi. The word is primarily used in medical terminology.