noun
dental plaque
Rare term for dental plaque; the common word is 歯垢 (しこう).
See also: 歯垢
歯かすは、歯垢と同じ意味で使われることがあるが、日常的にはあまり聞かない。
歯かす is sometimes used with the same meaning as 歯垢, but it is not commonly heard in everyday conversation.
Rare kanji spelling using 滓 (dregs/lees); not commonly used in modern writing.
Compound of 歯 (tooth) and かす (dregs, lees), literally 'tooth dregs'. The kanji 滓 is a rare ateji for かす.