| 单词 | rachis |
| 释义 | rachis n. (pl. rachides) 1. Bot. a a stem of grass etc. bearing flower-stalks at short intervals. b the axis of a compound leaf or frond. 2. Anat. the vertebral column or the cord from which it develops. 3. Zool. a feather-shaft, esp. the part bearing the barbs. Derivatives rachidial adj. Etymology: mod.L f. Gk rhakhis spine: the E pl. -ides is erron. |
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