歯し齦ぎん炎えんしぎんえんMeanings1noungingivitisrare termmedicineRare medical term for gingivitis. In modern Japanese, 歯肉炎 (しにくえん) is far more common.See also: 歯肉炎歯し齦ぎん炎えんは、歯し肉にく炎えんの古ふるい医い学がく用よう語ごとして文ぶん献けんに残のこっている。Shigin'en remains in literature as an older medical term for gingivitis.