| 单词 | pacemaker |
| 释义 | pacemaker —pacemaking, n. /pays"may'keuhr/, n. 1. pacesetter. 2. Med. an electronic device implanted beneath the skin for providing a normal heartbeat by electrical stimulation of the heart muscle, used in certain heart conditions. 3. Anat. , Physiol. any specialized tissue that governs a rhythmic or cyclic biological activity, as the sinoatrial node of the heart that controls heartbeat. [1880-85; PACE1 + MAKER] |
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