洞どう房ぼう結けっ節せつMeaningsNoun1. sinoatrial nodeKanji used洞cave房cluster結tied together節jointPitch accentどうぼうけっせつComposed of洞どうsinus; cavity; antrum; neighborhood (administrative division in North Korea)Noun房ぼうchamber; room; cell (prison); atrium; home of a monk; monk; Chinese "room" constellation (one of the 28 mansions)Noun結けっ節せつknot; nodule; tubercule; nodeNoun