| 单词 | sinoatrial node |
| 释义 | sinoatrial node in American English (ˌsaɪnoʊˈeɪtriəl) pacemaker (sense 2) pacemaker (sense 2a) : sometimes called ˌsinoauˈricular node (ˌsaɪnoʊɔˈrɪkjələr)sinoatrial node in American English (ˈsainouˈeitriəl, ˌsai-) noun Anatomy a small mass of tissue in the right atrium functioning as pacemaker of the heart by giving rise to the electric impulses that initiate heart contractions Also called: sinus node Word origin [1920–25; sino- + atrial]This word is first recorded in the period 1920–25. Other words that entered Englishat around the same time include: checkout, follow-up, ski jump, tie-in, zipperExamples of 'sinoatrial node' in a sentence |
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