While designing a piece of software, I needed to represent an object before it actually existed, and also after it ceased to exist. I picked the term “ghost” for the after-existence state, and to extend the metaphor, picked “zygote” for the before-existence state. Joining them together creates the term “zyghost” for any non-existence state. Seeing as Google reports only one uninteresting result for “zyghost”, I hereby claim it as a neologism of mine.