Exact historical dictionary sense
Cycle in Webster's 1913 dictionary
The 1913 record labels cycle as noun. Its source-bounded etymology and selected historical definition appear below.
[F. ycle, LL. cyclus, fr. Gr. ky`klos ring or circle, cycle; akin to Skr. cakra wheel, circle. See Wheel.]
Cross-verified historical senseIn Webster's Revised Unabridged Dictionary (1913), "cycle" is labeled noun. Its etymology is recorded as: "[F. ycle, LL. cyclus, fr. Gr. ky`klos ring or circle, cycle; akin to Skr. cakra wheel, circle. See Wheel.]" The selected historical definition says: "An imaginary circle or orbit in the heavens; one of the celestial spheres."