Strong's #5164: trochos (pronounced trokh-os')
from 5143; a wheel (as a runner), i.e. (figuratively) a circuit of physical effects:--course.
Thayer's Greek Lexicon:
́
trochos
1) a wheel
Part of Speech: noun neuter
Relation: from G5143
Usage:
This word is used 1 times:
James 3:6: "and setteth on fire the course of nature; and it is set on fire of"