| 单词 | nerve cord |
| 释义 | nerve cord 1. a single hollow tract of nervous tissue that constitutes the central nervous system of chordates and develops into the spinal cord and brain in vertebrates. 2. a solid double strand of nerve fibers along the length of the body in elongate invertebrates, as earthworms and insects, connecting with a pair of nerve ganglia at each body segment. [1875-80] |
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