Nanotech that's hard to trace or detect.
Nano-machines that function in low (hard to detect) concentrations and accomplish work by assembling short lived (i.e. relatively volatile) auxiliary nano-apparatus.
Nano-machines that largely disassemble themselves after or as part of completing their function leaving little traceable residue.
Nano-machines which contribute their structure to the product they are assembling, making them virtually indistinguishable from minor flaws or inconsistencies in the finished product.
- Blue Goo Ecologies
- Goo, Blue
- Goo, Golden - Text by M. Alan Kazlev, from Anders Sandberg's Transhumanist Terminology
A type of goo disaster, the strange name comes from an early Information Age hypothetical scenario. The idea was to use nanomachines to filter gold from seawater. If this process got out of control the result would be piles of golden goo (the " Wizard's Apprentice Problem"). This scenario demonstrated the need of keeping populations of self-replicating machines under control; it is much more common than grey goo, but also more manageable. Also Carbon Goo, Aluminium Goo, etc.
- Goo, Green - Text by M. Alan Kazlev
 A plague of bionano (non-drexlerian) goo; especially of strong biotic form. Green Goo outbreaks are (like Golden Goo) quite common, but easily managed, at least in those areas with good access to blue goo and equivalent.
 Facetious term for biological life spreading throughout the galaxy. c.f. pink goo.
 (archaic) The scenario of nanomachines or bio-engineered organisms used for human population control, either by governments or eco-terrorist groups (generally by sterilizing people through otherwise harmless infections).
- Goo, Grey
- Goo, Khaki
- Goo, Love
- Goo, Pink
- Googlider - Text by Xaonon
Type of filiglider that carries biogoo, especially blue goo and is larger than a standard filiglider so that it can handle a photosynthetic waste recycler system.
Text by Peter Kisner
Initially published on 31 December 2007.