Webster’s Revised Unabridged Dictionary · 1913
Systemless
Sys′tem·less, a. 1. Being without system.
2. (Nat. Hist.) Not agreeing with some artificial system of classification.
3. (Biol.) Not having any of the distinct systems or types of structure, as the radiate, articulate, etc., characteristic of organic nature; as, all unicellular organisms are systemless.