1. 近轴的：adaptor衔接头;衔接子 | adaxial近轴的 | addition加成
2. 向轴的,近轴的：adatome 吸附原子 | adaxial 向轴的,近轴的 | A-D converter模拟--数字转换器
3. 向轴的：adaptor molecule 衔接分子 | adaxial 向轴的 | adaxial surface of the leaf 叶下面
adj
1. nearest to or facing toward the axis of an organ or organism
e.g. the upper side of a leaf is known as the adaxial surface
Synonym: ventral