洞どうTop 20000MeaningsNoun1. sinus; cavity; antrum2. neighborhood (administrative division in North Korea)Kanji used洞cavePitch accentどうUsed in vocabulary石せっ灰かい洞どうlimestone caveNoun溶よう岩がん洞どうlava tubeNoun洞どう房ぼう結けっ節せつsinoatrial nodeNoun洞どう結けっ節せつsinus node; sinoatrial nodeNoun静じょう脈みゃく洞どうvenous sinus; sinus venosusNoun洞どう性せい不ふ整せい脈みゃくsinus arrhythmia; irregular heartbeatNounたいわんしょうどうつばめbrown-throated martin (Riparia paludicola); brown-throated sand martinNoun洞どう調ちょう律りつsinus rhythmNoun洞どう不ふ全ぜん症しょう候こう群ぐんsick sinus syndrome; sinus node dysfunction; SSSNoun脳のう静じょう脈みゃく洞どう血けっ栓せん症しょうcerebral venous sinus thrombosis; CVSTNoun冠かん状じょう静じょう脈みゃく洞どうcoronary sinusNoun静じょう脈みゃく洞どう血けっ栓せんsinus thrombosisNoun