Nice tries...
Fiducials: are "Vision Recognition" features, round, etc. that are usually used in pairs in a gray scale recognition system to calculate a X-Y point on a high-tech machine.
Sometimes you use 3 Fiducials to calculate stretch too... :)
Dendrites: are a growth between two conductive paths that have a Bias (Electrical Current) usually formed be Temperature, Humidity & the Current.
There! :)