Japanese symbol for “sinus”
洞
どう
Romaji: dou
sinus; cavity; antrum
In Japanese, sinus is 洞, read どう (dou).
Before using these characters for a tattoo, check them with a native speaker. Dictionary words often have several meanings, and the right choice depends on context.
Meanings
- n sinus; cavity; antrum (anat)
- n neighborhood (administrative division in North Korea)
Kanji and stroke order
Related words
Words that share a kanji.
| Word | Reading | Meaning |
|---|---|---|
| 洞窟 | どうくつ doukutsu | cave; cavern; grotto |
| 洞察 | どうさつ dousatsu | discernment; insight |
| 空洞 | くうどう kuudou | cavity; hollow; cave |
| 洞穴 | ほらあな horaana | cave; cavern; den |
| 鍾乳洞 | しょうにゅうどう shounyuudou | limestone cave; limestone cavern |
| 風洞 | ふうどう fuudou | wind tunnel |
See also: Chinese symbol for “sinus”.
Data: JMdict (CC BY-SA 4.0); KANJIDIC2 (CC BY-SA 4.0); KanjiVG (CC BY-SA 3.0); wordfreq (CC BY-SA 4.0 (data)). Retrieved 2026-10-22.