| 单词 | limb | 
| 释义 | limb  2   (lĭm)n. 1. Astronomy  The circumferential edge of the apparent disk of a celestial body. 2. Mathematics  The edge of a graduated arc or circle used in an instrument to measure angles. 3. Botany  The expanded tip of a plant organ, such as a petal or corolla lobe. [Middle English limbe, graduated edge of an astronomical instrument, from Old French, from Latin limbus, border.]  | 
	
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