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1. Oxford American Dictionary

   sinoatrial node

   • n.
     a small body of specialized muscle fibers, located in the right atrium of the heart, whose activity is responsible for initiating the heartbeat.

   • noun: sinoatrial node, plural noun: sinoatrial nodes

2. • 更多解釋

   sinoatrial node

   • IPA[ˌsīnōˌātrēəl ˈnōd]

   美式

   • adj.
     a small body of specialized muscle tissue in the wall of the right atrium of the heart that ...

   Oxford American Dictionary

   sinoatrial node

   • n.
     a small body of specialized muscle fibres, located in the right atrium of the heart, whose ...

   Oxford Dictionary