I. noun — [ mass noun] 1. the original evolution of life or living organisms from inorganic or inanimate substances • to construct any convincing theory of abiogenesis, we must take into account the condition of the Earth about 4 billion years ago.
‹historical› another term for spontaneous generation.
II. derivatives abiogenic adjective
– origin late 19th cent.: from a-1 ‘not’ + Greek bios ‘life’ + genesis.