octant

1. An instrument for measuring the angular distance between celestial objects; resembles an octant.
   测量两个天体之间的角距离；类似于八分仪。
2. By-using ketone octant rule, lactone chirality rule and lactone sector rule, the predicted cotton effects of these compounds coincided with the result of determination and so the absolute configurations were assigned.
   应用羰基的八区律、内酯的手性规则和内酯的扇形规则，所预测的这些化合物的cotton效应与实测结果一致，从而指定了它们的绝对构型。
3. Early Introduction and Studies on the Western Double Reflecting Octant in China
   中国早期对西方双反射八分仪的介绍和研究
4. A series of modifications are made to the original algorithm of octree based finite element meshing, such as the establishment of a new data structure, the identifying of the octant attribute and the processing of boundary elements.
   本文的算法对传统的八叉树法进行了一系列的改进，包括新型数据结构的建立，对八叉树结点属性判断算法的改进，边界结点体处理方法的改进等。
5. Octant Conversions of Moving Objects
   运动物体的八分体变换
6. A data re-presentation for computer implementation of octant encoding is given.
   给出八分体编码在计算机中实现时的数据表示法。
7. The general changes of vectorcardiograms were: the spatial axis of the QRS loop shifted towards the right posterior superior octant and the T loop towards the left posterior inferior octant.
   心电向量图总的变化是QRS空间综合向量向右、后、上方偏移，T向量向左、后，下方偏移；

noun

1. a measuring instrument for measuring angles to a celestial body