单词 | node |
释义 | node /nohd/, n. 1. a knot, protuberance, or knob. 2. a centering point of component parts. 3. Anat. a knotlike mass of tissue: lymph node. 4. Pathol. circumscribed swelling. 5. Bot. a. a joint in a stem. b. a part of a stem that normally bears a leaf. 6. Math. knot (def. 12). 7. Geom. a point on a curve or surface at which there can be more than one tangent line or tangent plane. 8. Physics. a point, line, or region in a standing wave at which there is relatively little or no vibration. 9. Astron. either of the two points at which the orbit of a heavenly body intersects a given plane, esp. the plane of the ecliptic or of the celestial equator. Cf. ascending node, descending node. 10. Ling. an element of a tree diagram that represents a constituent of a linguistic construction. 11. Optics. See nodal point. 12. Engin. See panel point. 13. nodus. [1565-75; < L nodus knot] |
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