Fossil remains of silicon-based, martian insects. A silicon based lifeform is a corporeal lifeform which uses silicon as the basis of its structure and life functions rather than carbon. Silicon based lifeforms Crystalline Entity Excalbian of Excalbia. (TOS: "The Savage Curtain") Horta of Janus VI. (TOS: "The Devil in the Dark") Microbrain of Velara III (TNG: "Home Soil") Silicon-based parasite. (VOY: "The Disease") Silicon-based virus. (ENT: "Observer Effect") Retrieved from "https://memory-alpha.fandom.com/wiki/Silicon-based_lifeform?oldid=237078" Categories: Species Community content is available under CC-BY-NC unless otherwise noted.