orbital
Meaning
Relating to an orbit or orbits.
(British) Relating to a major road passing around the outside of a city.
Structure
Usage
The satellite was placed in a stable orbital path around Earth.
Scientists calculated the orbital period of the new exoplanet.
We took the orbital to avoid the city centre traffic.
Etymology
The word 'orbital' is a modern scientific formation built upon the classical Latin noun orbita, which originally meant the track or rut made by a wheel. This sense of a circular path was metaphorically extended in astronomy to describe the regular, repeating course of a celestial body. The adjectival suffix -alis (English -al) was appended to create a term meaning 'pertaining to an orbit.' In the mid-20th century, this astronomical term was borrowed into atomic physics to describe the region of space where an electron is likely to be found, and into British urban planning to designate a major circumferential road.
Analysis
orbit (from Latin orbita, meaning track, rut, course); al (from Latin adjectival suffix -alis, meaning of or pertaining to).