Cylons means: Noun, plural. Singular: Cylon. The Cylons are a bio-mechanical species of worker that was created in another part of the galaxy from humans of other planets. The Cylons were forced to serve as slaves. They almost destroyed their creators before they could call a truce. They have continued to develop and are almost identical to human-like Cylons. The Cylons are still angry at their treatment and have set out again to kill all people. (in Community Dictionary, added by Giovanna Lambert)