1
- of or relating to an orbit or orbits（与）轨道（有关）的。
1.1
- Brit. (of a road) passing round the outside of a town〈英〉（道路）环城的, 绕城的。
1
- Brit. an orbital road〈英〉环形路。
2
- Physics each of the actual or potential patterns of electron density which may be formed in an atom or molecule by one or more electrons, and can be represented as a wave function【物理】轨道电子密度。
词源
mid 16th cent. (referring to the eye socket)： probably from medieval Latin orbitalis, from Latin orbita （see ORBIT）.