| Word | Definitions | Synonyms |
|---|---|---|
| abiogenesis | (noun) a hypothetical organic phenomenon by which living organisms are created from nonliving matter | Synonyms: autogenesis, autogeny, spontaneous generation |
| abiogenist | (noun) a believer in abiogenesis | - |
| abiotrophy | (noun) a loss of vitality and a degeneration of cells and tissues not due to any apparent injury | - |