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1.
An hypothesis which is evidenceless. It's fueled by faith and speculation and there is no evidence of life being able to arise/form by itself. Lab experiments only confirm that intelligence is needed for something even only a remotely bit complex to form further reinforcing the scientific law of Biogenesis (life from life).
Abiogenesis is the faith based creation myth of the atheist.
by Skialian January 08, 2014
 
2.
(noun) Spontaneous Generation. People originally thought larvae randomly appeared on poop, and mold randomly grew. Or, more correctly, spontaneously generated. This is now known to be false, but is a theory still taught in school. Some teenagers like to use it as a sort-of-funny explanation.
Man A: How'd that dog crap get on my bed?

Man B, who had put it there because Man A is such a neat freak: Must be abiogenesis.

Man A: What's that?

Man B: You know, Spontaneous Generation? Just randomly grew out of nothing.
by tiagirl April 01, 2010