1. the shorter or shortest axis of an ellipse or ellipsoid. 
   椭圆的较短的轴或椭球中最短的轴。
2. (botany) of a cylindrical or ellipsoid body; swollen and constricted at intervals. 
   （植）指圆柱或椭圆的物体；不时膨胀收缩。
3. the longest axis of an ellipse or ellipsoid; passes through the two foci. 
   椭圆中较长的那个轴；穿过两个焦点的轴。
4. An evergreen tropical American tree(Theobroma cacao) having leathery, ellipsoid, ten-ribbed fruits borne on the trunks and older branches. 
   可可一种美国的热带常绿树木（可可树可可树属），果实呈椭球形，有坚韧外壳，壳上有十道棱，果实结在树干上和老的枝条上
5. deciduous shrub of eastern North America whose leaves turn scarlet in autumn and having racemes of yellow flowers followed by ellipsoid glossy red berries. 
   北美东部每年落叶的灌木，它的叶子在秋天变成鲜红色有黄色花的总状花序和椭圆的平滑的红浆果。

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